86716531 has 4 divisors (see below), whose sum is σ = 94599864. Its totient is φ = 78833200.

The previous prime is 86716529. The next prime is 86716543. The reversal of 86716531 is 13561768.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86716531 - 2¹ = 86716529 is a prime.

It is a super-2 number, since 2×86716531² = 15039513497347922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86716501) 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 in 3 ways as a sum of consecutive naturals, for example, 3941650 + ... + 3941671.

It is an arithmetic number, because the mean of its divisors is an integer number (23649966).

Almost surely, 2^86716531 is an apocalyptic number.

86716531 is a deficient number, since it is larger than the sum of its proper divisors (7883333).

86716531 is a wasteful number, since it uses less digits than its factorization.

86716531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7883332.

The product of its digits is 30240, while the sum is 37.

The square root of 86716531 is about 9312.1711217095. The cubic root of 86716531 is about 442.6229877211.

It can be divided in two parts, 86 and 716531, that added together give a palindrome (716617).

The spelling of 86716531 in words is "eighty-six million, seven hundred sixteen thousand, five hundred thirty-one".