80739531 has 32 divisors (see below), whose sum is σ = 129996800. Its totient is φ = 49338720.

The previous prime is 80739523. The next prime is 80739541. The reversal of 80739531 is 13593708.

It is not a de Polignac number, because 80739531 - 2³ = 80739523 is a prime.

It is a super-2 number, since 2×80739531² = 13037743732199922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80739521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13365 + ... + 18441.

It is an arithmetic number, because the mean of its divisors is an integer number (4062400).

Almost surely, 2^80739531 is an apocalyptic number.

80739531 is a deficient number, since it is larger than the sum of its proper divisors (49257269).

80739531 is a wasteful number, since it uses less digits than its factorization.

80739531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5136 (or 5130 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 80739531 is about 8985.5178481822. The cubic root of 80739531 is about 432.2105936954.

The spelling of 80739531 in words is "eighty million, seven hundred thirty-nine thousand, five hundred thirty-one".