99972124 has 12 divisors (see below), whose sum is σ = 199944304. Its totient is φ = 42845184.

The previous prime is 99972079. The next prime is 99972157. The reversal of 99972124 is 42127999.

99972124 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785189 + ... + 1785244.

Almost surely, 2^99972124 is an apocalyptic number.

It is an amenable number.

99972124 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

99972124 is a wasteful number, since it uses less digits than its factorization.

99972124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570444 (or 3570442 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 99972124 is about 9998.6061028525. The cubic root of 99972124 is about 464.1157497096.

It can be divided in two parts, 9997 and 2124, that added together give a palindrome (12121).

The spelling of 99972124 in words is "ninety-nine million, nine hundred seventy-two thousand, one hundred twenty-four".