86431081 has 4 divisors (see below), whose sum is σ = 94288464. Its totient is φ = 78573700.

The previous prime is 86431063. The next prime is 86431109. The reversal of 86431081 is 18013468.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86431081 - 2¹⁷ = 86300009 is a prime.

It is a super-2 number, since 2×86431081² = 14940663525657122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86431061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3928675 + ... + 3928696.

It is an arithmetic number, because the mean of its divisors is an integer number (23572116).

Almost surely, 2^86431081 is an apocalyptic number.

It is an amenable number.

86431081 is a deficient number, since it is larger than the sum of its proper divisors (7857383).

86431081 is a wasteful number, since it uses less digits than its factorization.

86431081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857382.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 86431081 is about 9296.8317721684. The cubic root of 86431081 is about 442.1367843070.

The spelling of 86431081 in words is "eighty-six million, four hundred thirty-one thousand, eighty-one".