115731689 has 4 divisors (see below), whose sum is σ = 116000640. Its totient is φ = 115462740.

The previous prime is 115731677. The next prime is 115731691. The reversal of 115731689 is 986137511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115731689 - 2⁴ = 115731673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115731089) 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 in 3 ways as a sum of consecutive naturals, for example, 133829 + ... + 134690.

It is an arithmetic number, because the mean of its divisors is an integer number (29000160).

Almost surely, 2^115731689 is an apocalyptic number.

It is an amenable number.

115731689 is a deficient number, since it is larger than the sum of its proper divisors (268951).

115731689 is an equidigital number, since it uses as much as digits as its factorization.

115731689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268950.

The product of its digits is 45360, while the sum is 41.

The square root of 115731689 is about 10757.8663776792. The cubic root of 115731689 is about 487.3235849947.

The spelling of 115731689 in words is "one hundred fifteen million, seven hundred thirty-one thousand, six hundred eighty-nine".