115699889 has 2 divisors, whose sum is σ = 115699890. Its totient is φ = 115699888.

The previous prime is 115699819. The next prime is 115699897. The reversal of 115699889 is 988996511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66699889 + 49000000 = 8167^2 + 7000^2 .

It is a cyclic number.

It is not a de Polignac number, because 115699889 - 2¹² = 115695793 is a prime.

It is a super-2 number, since 2×115699889² = 26772928629224642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115699819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57849944 + 57849945.

It is an arithmetic number, because the mean of its divisors is an integer number (57849945).

Almost surely, 2^115699889 is an apocalyptic number.

It is an amenable number.

115699889 is a deficient number, since it is larger than the sum of its proper divisors (1).

115699889 is an equidigital number, since it uses as much as digits as its factorization.

115699889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 56.

The square root of 115699889 is about 10756.3882878966. The cubic root of 115699889 is about 487.2789463720.

The spelling of 115699889 in words is "one hundred fifteen million, six hundred ninety-nine thousand, eight hundred eighty-nine".