86945731 has 8 divisors (see below), whose sum is σ = 89900928. Its totient is φ = 84000000.

The previous prime is 86945717. The next prime is 86945759. The reversal of 86945731 is 13754968.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86945731 - 2²³ = 78557123 is a prime.

It is a super-2 number, since 2×86945731² = 15119120278248722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86045731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19731 + ... + 23731.

It is an arithmetic number, because the mean of its divisors is an integer number (11237616).

Almost surely, 2^86945731 is an apocalyptic number.

86945731 is a deficient number, since it is larger than the sum of its proper divisors (2955197).

86945731 is a wasteful number, since it uses less digits than its factorization.

86945731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4733.

The product of its digits is 181440, while the sum is 43.

The square root of 86945731 is about 9324.4694755251. The cubic root of 86945731 is about 443.0126094718.

The spelling of 86945731 in words is "eighty-six million, nine hundred forty-five thousand, seven hundred thirty-one".