115910591 has 2 divisors, whose sum is σ = 115910592. Its totient is φ = 115910590.

The previous prime is 115910569. The next prime is 115910609. The reversal of 115910591 is 195019511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115910591 is a prime.

It is equal to p_6621683 and since 115910591 and 6621683 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115910551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57955295 + 57955296.

It is an arithmetic number, because the mean of its divisors is an integer number (57955296).

Almost surely, 2^115910591 is an apocalyptic number.

115910591 is a deficient number, since it is larger than the sum of its proper divisors (1).

115910591 is an equidigital number, since it uses as much as digits as its factorization.

115910591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2025, while the sum is 32.

The square root of 115910591 is about 10766.1781055303. The cubic root of 115910591 is about 487.5745628664.

The spelling of 115910591 in words is "one hundred fifteen million, nine hundred ten thousand, five hundred ninety-one".