Base | Representation |
---|---|
bin | 1110000100010011101100010… |
… | …1100111011100011001101101 |
3 | 11210210221101210112111120202221 |
4 | 3201010323011213130121231 |
5 | 2014222000204200231424 |
6 | 13425201120351515341 |
7 | 415335553525061413 |
oct | 34104730547343155 |
9 | 4723841715446687 |
10 | 989898787898989 |
11 | 26745979a185051 |
12 | 93035025228b51 |
13 | 3364709424c2a7 |
14 | 136634dd7672b3 |
15 | 7969814a429e4 |
hex | 3844ec59dc66d |
989898787898989 has 2 divisors, whose sum is σ = 989898787898990. Its totient is φ = 989898787898988.
The previous prime is 989898787898959. The next prime is 989898787899001.
989898787898989 is nontrivially palindromic in base 10.
989898787898989 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 984702517200900 + 5196270698089 = 31379970^2 + 2279533^2 .
It is a palprime.
It is a cyclic number.
It is not a de Polignac number, because 989898787898989 - 27 = 989898787898861 is a prime.
It is a super-2 number, since 2×9898987878989892 (a number of 31 digits) contains 22 as substring.
It is an alternating number because its digits alternate between odd and even.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (989898787898959) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494949393949494 + 494949393949495.
It is an arithmetic number, because the mean of its divisors is an integer number (494949393949495).
Almost surely, 2989898787898989 is an apocalyptic number.
It is an amenable number.
989898787898989 is a deficient number, since it is larger than the sum of its proper divisors (1).
989898787898989 is an equidigital number, since it uses as much as digits as its factorization.
989898787898989 is an evil number, because the sum of its binary digits is even.
The product of its digits is 54611115245568, while the sum is 124.
It can be divided in two parts, 989898 and 787898989, that added together give a palindrome (788888887).
The spelling of 989898787898989 in words is "nine hundred eighty-nine trillion, eight hundred ninety-eight billion, seven hundred eighty-seven million, eight hundred ninety-eight thousand, nine hundred eighty-nine".
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