80739791 has 8 divisors (see below), whose sum is σ = 88809168. Its totient is φ = 73398600.

The previous prime is 80739787. The next prime is 80739803. The reversal of 80739791 is 19793708.

It is not a de Polignac number, because 80739791 - 2² = 80739787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80739731) 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, 29000 + ... + 31661.

It is an arithmetic number, because the mean of its divisors is an integer number (11101146).

Almost surely, 2^80739791 is an apocalyptic number.

80739791 is a deficient number, since it is larger than the sum of its proper divisors (8069377).

80739791 is an equidigital number, since it uses as much as digits as its factorization.

80739791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60694 (or 60672 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 80739791 is about 8985.5323158954. The cubic root of 80739791 is about 432.2110576343.

The spelling of 80739791 in words is "eighty million, seven hundred thirty-nine thousand, seven hundred ninety-one".