79989100 has 18 divisors (see below), whose sum is σ = 173576564. Its totient is φ = 31995600.

The previous prime is 79989061. The next prime is 79989109. The reversal of 79989100 is 198997.

It is a super-2 number, since 2×79989100² = 12796512237620000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79989109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 399846 + ... + 400045.

Almost surely, 2^79989100 is an apocalyptic number.

It is an amenable number.

79989100 is an abundant number, since it is smaller than the sum of its proper divisors (93587464).

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

79989100 is a wasteful number, since it uses less digits than its factorization.

79989100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799905 (or 799898 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 79989100 is about 8943.6625607186. The cubic root of 79989100 is about 430.8673676691.

It can be divided in two parts, 79989 and 100, that added together give a square (80089 = 283²).

The spelling of 79989100 in words is "seventy-nine million, nine hundred eighty-nine thousand, one hundred".