86517681 has 16 divisors (see below), whose sum is σ = 116582400. Its totient is φ = 57069648.

The previous prime is 86517679. The next prime is 86517707. The reversal of 86517681 is 18671568.

It is not a de Polignac number, because 86517681 - 2¹ = 86517679 is a prime.

It is a super-2 number, since 2×86517681² = 14970618251235522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86517601) 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, 196860 + ... + 197298.

It is an arithmetic number, because the mean of its divisors is an integer number (7286400).

Almost surely, 2^86517681 is an apocalyptic number.

It is an amenable number.

86517681 is a deficient number, since it is larger than the sum of its proper divisors (30064719).

86517681 is a wasteful number, since it uses less digits than its factorization.

86517681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988.

The product of its digits is 80640, while the sum is 42.

The square root of 86517681 is about 9301.4881067494. The cubic root of 86517681 is about 442.2844019781.

The spelling of 86517681 in words is "eighty-six million, five hundred seventeen thousand, six hundred eighty-one".