80979998 has 16 divisors (see below), whose sum is σ = 136788480. Its totient is φ = 35621400.

The previous prime is 80979991. The next prime is 80980007. The reversal of 80979998 is 89997908.

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 7 ways as a sum of consecutive naturals, for example, 58688 + ... + 60051.

It is an arithmetic number, because the mean of its divisors is an integer number (8549280).

Almost surely, 2^80979998 is an apocalyptic number.

80979998 is a deficient number, since it is larger than the sum of its proper divisors (55808482).

80979998 is a wasteful number, since it uses less digits than its factorization.

80979998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118783.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The square root of 80979998 is about 8998.8887091685. Note that the first 3 decimals coincide. The cubic root of 80979998 is about 432.6392534987.

The spelling of 80979998 in words is "eighty million, nine hundred seventy-nine thousand, nine hundred ninety-eight".