99972136 has 48 divisors (see below), whose sum is σ = 207799200. Its totient is φ = 45054240.

The previous prime is 99972079. The next prime is 99972157. The reversal of 99972136 is 63127999.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134181 + ... + 134923.

It is an arithmetic number, because the mean of its divisors is an integer number (4329150).

Almost surely, 2^99972136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99972136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103899600).

99972136 is an abundant number, since it is smaller than the sum of its proper divisors (107827064).

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

99972136 is a wasteful number, since it uses less digits than its factorization.

99972136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 895 counting only the distinct ones).

The product of its digits is 183708, while the sum is 46.

The square root of 99972136 is about 9998.6067029362. The cubic root of 99972136 is about 464.1157682794.

The spelling of 99972136 in words is "ninety-nine million, nine hundred seventy-two thousand, one hundred thirty-six".