898789878989 has 2 divisors, whose sum is σ = 898789878990. Its totient is φ = 898789878988.

The previous prime is 898789878967. The next prime is 898789879019. The reversal of 898789878989 is 989878987898.

It is a happy number.

898789878989 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 600764508100 + 298025370889 = 775090^2 + 545917^2 .

It is a cyclic number.

It is not a de Polignac number, because 898789878989 - 2¹² = 898789874893 is a prime.

It is a super-2 number, since 2×898789878989² (a number of 25 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 898789878895 and 898789878904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (898789878919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449394939494 + 449394939495.

It is an arithmetic number, because the mean of its divisors is an integer number (449394939495).

Almost surely, 2^898789878989 is an apocalyptic number.

It is an amenable number.

898789878989 is a deficient number, since it is larger than the sum of its proper divisors (1).

898789878989 is an equidigital number, since it uses as much as digits as its factorization.

898789878989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84276412416, while the sum is 98.

The spelling of 898789878989 in words is "eight hundred ninety-eight billion, seven hundred eighty-nine million, eight hundred seventy-eight thousand, nine hundred eighty-nine".