80938791 has 32 divisors (see below), whose sum is σ = 123275520. Its totient is φ = 52464672.

The previous prime is 80938787. The next prime is 80938859. The reversal of 80938791 is 19783908.

It is not a de Polignac number, because 80938791 - 2² = 80938787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80930791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233080 + ... + 233426.

It is an arithmetic number, because the mean of its divisors is an integer number (3852360).

Almost surely, 2^80938791 is an apocalyptic number.

80938791 is a deficient number, since it is larger than the sum of its proper divisors (42336729).

80938791 is a wasteful number, since it uses less digits than its factorization.

80938791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 80938791 is about 8996.5988573460. The cubic root of 80938791 is about 432.5658576358.

The spelling of 80938791 in words is "eighty million, nine hundred thirty-eight thousand, seven hundred ninety-one".