81932924 has 12 divisors (see below), whose sum is σ = 146880048. Its totient is φ = 39967200.

The previous prime is 81932909. The next prime is 81932941. The reversal of 81932924 is 42923918.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 249632 + ... + 249959.

It is an arithmetic number, because the mean of its divisors is an integer number (12240004).

Almost surely, 2^81932924 is an apocalyptic number.

It is an amenable number.

81932924 is a deficient number, since it is larger than the sum of its proper divisors (64947124).

81932924 is a wasteful number, since it uses less digits than its factorization.

81932924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499636 (or 499634 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 81932924 is about 9051.6807279090. The cubic root of 81932924 is about 434.3296567337.

The spelling of 81932924 in words is "eighty-one million, nine hundred thirty-two thousand, nine hundred twenty-four".