115685891 has 2 divisors, whose sum is σ = 115685892. Its totient is φ = 115685890.

The previous prime is 115685881. The next prime is 115685903. The reversal of 115685891 is 198586511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115685891 - 2¹⁰ = 115684867 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115685861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57842945 + 57842946.

It is an arithmetic number, because the mean of its divisors is an integer number (57842946).

Almost surely, 2^115685891 is an apocalyptic number.

115685891 is a deficient number, since it is larger than the sum of its proper divisors (1).

115685891 is an equidigital number, since it uses as much as digits as its factorization.

115685891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 44.

The square root of 115685891 is about 10755.7375851217. The cubic root of 115685891 is about 487.2592943630.

The spelling of 115685891 in words is "one hundred fifteen million, six hundred eighty-five thousand, eight hundred ninety-one".