79191972 has 48 divisors (see below), whose sum is σ = 205941120. Its totient is φ = 26316576.

The previous prime is 79191971. The next prime is 79191977. The reversal of 79191972 is 27919197.

It is not an unprimeable number, because it can be changed into a prime (79191971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41953 + ... + 43799.

It is an arithmetic number, because the mean of its divisors is an integer number (4290440).

Almost surely, 2^79191972 is an apocalyptic number.

It is an amenable number.

79191972 is an abundant number, since it is smaller than the sum of its proper divisors (126749148).

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

79191972 is a wasteful number, since it uses less digits than its factorization.

79191972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257 (or 2249 counting only the distinct ones).

The product of its digits is 71442, while the sum is 45.

The square root of 79191972 is about 8898.9871333765. The cubic root of 79191972 is about 429.4313232497.

The spelling of 79191972 in words is "seventy-nine million, one hundred ninety-one thousand, nine hundred seventy-two".