81976922 has 16 divisors (see below), whose sum is σ = 129140352. Its totient is φ = 38953200.

The previous prime is 81976919. The next prime is 81976981. The reversal of 81976922 is 22967918.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1547 + ... + 12897.

It is an arithmetic number, because the mean of its divisors is an integer number (8071272).

Almost surely, 2^81976922 is an apocalyptic number.

81976922 is a deficient number, since it is larger than the sum of its proper divisors (47163430).

81976922 is a wasteful number, since it uses less digits than its factorization.

81976922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11533.

The product of its digits is 108864, while the sum is 44.

The square root of 81976922 is about 9054.1107790881. The cubic root of 81976922 is about 434.4073878650.

The spelling of 81976922 in words is "eighty-one million, nine hundred seventy-six thousand, nine hundred twenty-two".