81962974 has 16 divisors (see below), whose sum is σ = 124888320. Its totient is φ = 40336920.

The previous prime is 81962957. The next prime is 81962989. The reversal of 81962974 is 47926918.

It is a congruent 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, 69409 + ... + 70579.

It is an arithmetic number, because the mean of its divisors is an integer number (7805520).

Almost surely, 2^81962974 is an apocalyptic number.

81962974 is a deficient number, since it is larger than the sum of its proper divisors (42925346).

81962974 is a wasteful number, since it uses less digits than its factorization.

81962974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695.

The product of its digits is 217728, while the sum is 46.

The square root of 81962974 is about 9053.3404884606. The cubic root of 81962974 is about 434.3827489879.

The spelling of 81962974 in words is "eighty-one million, nine hundred sixty-two thousand, nine hundred seventy-four".