86115921 has 16 divisors (see below), whose sum is σ = 116894400. Its totient is φ = 56383488.

The previous prime is 86115907. The next prime is 86115943. The reversal of 86115921 is 12951168.

It is not a de Polignac number, because 86115921 - 2⁵ = 86115889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86115121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39385 + ... + 41513.

It is an arithmetic number, because the mean of its divisors is an integer number (7305900).

Almost surely, 2^86115921 is an apocalyptic number.

It is an amenable number.

86115921 is a deficient number, since it is larger than the sum of its proper divisors (30778479).

86115921 is a wasteful number, since it uses less digits than its factorization.

86115921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368.

The product of its digits is 4320, while the sum is 33.

The square root of 86115921 is about 9279.8664322284. The cubic root of 86115921 is about 441.5987311830.

The spelling of 86115921 in words is "eighty-six million, one hundred fifteen thousand, nine hundred twenty-one".