115678889 has 2 divisors, whose sum is σ = 115678890. Its totient is φ = 115678888.

The previous prime is 115678879. The next prime is 115678961. The reversal of 115678889 is 988876511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69438889 + 46240000 = 8333^2 + 6800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115678889 is a prime.

It is a super-3 number, since 3×115678889³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 115678889.

It is not a weakly prime, because it can be changed into another prime (115678879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57839444 + 57839445.

It is an arithmetic number, because the mean of its divisors is an integer number (57839445).

Almost surely, 2^115678889 is an apocalyptic number.

It is an amenable number.

115678889 is a deficient number, since it is larger than the sum of its proper divisors (1).

115678889 is an equidigital number, since it uses as much as digits as its factorization.

115678889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 53.

The square root of 115678889 is about 10755.4120795068. The cubic root of 115678889 is about 487.2494635519.

The spelling of 115678889 in words is "one hundred fifteen million, six hundred seventy-eight thousand, eight hundred eighty-nine".