79681974 has 16 divisors (see below), whose sum is σ = 159602880. Its totient is φ = 26520840.

The previous prime is 79681963. The next prime is 79681981. The reversal of 79681974 is 47918697.

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, 5464 + ... + 13755.

It is an arithmetic number, because the mean of its divisors is an integer number (9975180).

Almost surely, 2^79681974 is an apocalyptic number.

79681974 is an abundant number, since it is smaller than the sum of its proper divisors (79920906).

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

79681974 is a wasteful number, since it uses less digits than its factorization.

79681974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19915.

The product of its digits is 762048, while the sum is 51.

The square root of 79681974 is about 8926.4760124027. The cubic root of 79681974 is about 430.3152078591.

The spelling of 79681974 in words is "seventy-nine million, six hundred eighty-one thousand, nine hundred seventy-four".