79121976 has 64 divisors (see below), whose sum is σ = 207360000. Its totient is φ = 25124736.

The previous prime is 79121969. The next prime is 79122007. The reversal of 79121976 is 67912197.

It is a happy number.

It is a super-2 number, since 2×79121976² = 12520574172289152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54265 + ... + 55703.

It is an arithmetic number, because the mean of its divisors is an integer number (3240000).

Almost surely, 2^79121976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79121976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103680000).

79121976 is an abundant number, since it is smaller than the sum of its proper divisors (128238024).

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

79121976 is a wasteful number, since it uses less digits than its factorization.

79121976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1552 counting only the distinct ones).

The product of its digits is 47628, while the sum is 42.

The square root of 79121976 is about 8895.0534568377. The cubic root of 79121976 is about 429.3047643974.

The spelling of 79121976 in words is "seventy-nine million, one hundred twenty-one thousand, nine hundred seventy-six".