79999900 has 18 divisors (see below), whose sum is σ = 173600000. Its totient is φ = 31999920.

The previous prime is 79999879. The next prime is 79999973. The reversal of 79999900 is 999997.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 399900 + ... + 400099.

Almost surely, 2^79999900 is an apocalyptic number.

It is an amenable number.

79999900 is an abundant number, since it is smaller than the sum of its proper divisors (93600100).

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

79999900 is a wasteful number, since it uses less digits than its factorization.

79999900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800013 (or 800006 counting only the distinct ones).

The product of its (nonzero) digits is 413343, while the sum is 52.

The square root of 79999900 is about 8944.2663198275. The cubic root of 79999900 is about 430.8867584701.

The spelling of 79999900 in words is "seventy-nine million, nine hundred ninety-nine thousand, nine hundred".