86831437 has 16 divisors (see below), whose sum is σ = 110305152. Its totient is φ = 66381120.

The previous prime is 86831401. The next prime is 86831441. The reversal of 86831437 is 73413868.

It is a cyclic number.

It is not a de Polignac number, because 86831437 - 2⁷ = 86831309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86831437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86831447) 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, 6558 + ... + 14719.

It is an arithmetic number, because the mean of its divisors is an integer number (6894072).

Almost surely, 2^86831437 is an apocalyptic number.

It is an amenable number.

86831437 is a deficient number, since it is larger than the sum of its proper divisors (23473715).

86831437 is a wasteful number, since it uses less digits than its factorization.

86831437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21348.

The product of its digits is 96768, while the sum is 40.

The square root of 86831437 is about 9318.3387467939. The cubic root of 86831437 is about 442.8184044753.

Subtracting from 86831437 its reverse (73413868), we obtain a square (13417569 = 3663²).

The spelling of 86831437 in words is "eighty-six million, eight hundred thirty-one thousand, four hundred thirty-seven".