115316989 has 2 divisors, whose sum is σ = 115316990. Its totient is φ = 115316988.

The previous prime is 115316977. The next prime is 115317017. The reversal of 115316989 is 989613511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64080025 + 51236964 = 8005^2 + 7158^2 .

It is a cyclic number.

It is not a de Polignac number, because 115316989 - 2¹³ = 115308797 is a prime.

It is a super-2 number, since 2×115316989² = 26596015904052242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115316939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57658494 + 57658495.

It is an arithmetic number, because the mean of its divisors is an integer number (57658495).

Almost surely, 2^115316989 is an apocalyptic number.

It is an amenable number.

115316989 is a deficient number, since it is larger than the sum of its proper divisors (1).

115316989 is an equidigital number, since it uses as much as digits as its factorization.

115316989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 43.

The square root of 115316989 is about 10738.5748123296. The cubic root of 115316989 is about 486.7408147380.

The spelling of 115316989 in words is "one hundred fifteen million, three hundred sixteen thousand, nine hundred eighty-nine".