86615091 has 36 divisors (see below), whose sum is σ = 134800848. Its totient is φ = 53565408.

The previous prime is 86615071. The next prime is 86615093. The reversal of 86615091 is 19051668.

It is not a de Polignac number, because 86615091 - 2⁶ = 86615027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86615093) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 171946 + ... + 172448.

It is an arithmetic number, because the mean of its divisors is an integer number (3744468).

Almost surely, 2^86615091 is an apocalyptic number.

86615091 is a deficient number, since it is larger than the sum of its proper divisors (48185757).

86615091 is a wasteful number, since it uses less digits than its factorization.

86615091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 86615091 is about 9306.7228926191. The cubic root of 86615091 is about 442.4503286197.

The spelling of 86615091 in words is "eighty-six million, six hundred fifteen thousand, ninety-one".