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989898789 = 311293161547
BaseRepresentation
bin111011000000001…
…010100000100101
32112222200001212010
4323000022200211
54011403230124
6242120544433
733350000205
oct7300124045
92488601763
10989898789
11468854680
12237622119
1312a111539
149567c405
155bd88529
hex3b00a825

989898789 has 64 divisors (see below), whose sum is σ = 1565614080. Its totient is φ = 550368000.

The previous prime is 989898781. The next prime is 989898809. The reversal of 989898789 is 987898989.

989898789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 989898789 - 23 = 989898781 is a prime.

It is a super-2 number, since 2×9898987892 = 1959799224927333042, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 989898789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989898781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1809414 + ... + 1809960.

It is an arithmetic number, because the mean of its divisors is an integer number (24462720).

Almost surely, 2989898789 is an apocalyptic number.

It is an amenable number.

989898789 is a deficient number, since it is larger than the sum of its proper divisors (575715291).

989898789 is a wasteful number, since it uses less digits than its factorization.

989898789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682.

The product of its digits is 188116992, while the sum is 75.

The square root of 989898789 is about 31462.6570556271. The cubic root of 989898789 is about 996.6215284507.

The spelling of 989898789 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, seven hundred eighty-nine".

Divisors: 1 3 11 29 31 33 61 87 93 183 319 341 547 671 899 957 1023 1641 1769 1891 2013 2697 5307 5673 6017 9889 15863 16957 18051 19459 20801 29667 33367 47589 50871 54839 58377 62403 100101 164517 174493 186527 367037 491753 523479 559581 603229 967643 1034377 1101111 1475259 1809687 2902929 3103131 5409283 10644073 11378147 16227849 29996933 31932219 34134441 89990799 329966263 989898789