80979997 has 12 divisors (see below), whose sum is σ = 94636416. Its totient is φ = 69090840.

The previous prime is 80979991. The next prime is 80980007. The reversal of 80979997 is 79997908.

It is a de Polignac number, because none of the positive numbers 2^k-80979997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80979991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7222 + ... + 14632.

It is an arithmetic number, because the mean of its divisors is an integer number (7886368).

Almost surely, 2^80979997 is an apocalyptic number.

It is an amenable number.

80979997 is a deficient number, since it is larger than the sum of its proper divisors (13656419).

80979997 is a wasteful number, since it uses less digits than its factorization.

80979997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7648 (or 7641 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 58.

The square root of 80979997 is about 8998.8886536061. Note that the first 3 decimals coincide. The cubic root of 80979997 is about 432.6392517178.

The spelling of 80979997 in words is "eighty million, nine hundred seventy-nine thousand, nine hundred ninety-seven".