80931918 has 8 divisors (see below), whose sum is σ = 161863848. Its totient is φ = 26977304.

The previous prime is 80931881. The next prime is 80931943. The reversal of 80931918 is 81913908.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

80931918 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6744321 + ... + 6744332.

It is an arithmetic number, because the mean of its divisors is an integer number (20232981).

Almost surely, 2^80931918 is an apocalyptic number.

80931918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80931918 is a wasteful number, since it uses less digits than its factorization.

80931918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13488658.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 80931918 is about 8996.2168715522. The cubic root of 80931918 is about 432.5536133655.

It can be divided in two parts, 8093 and 1918, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 80931918 in words is "eighty million, nine hundred thirty-one thousand, nine hundred eighteen".