99332172 has 18 divisors (see below), whose sum is σ = 251089748. Its totient is φ = 33110712.

The previous prime is 99332137. The next prime is 99332201. The reversal of 99332172 is 27123399.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2759227 = 99332172 / (9 + 9 + 3 + 3 + 2 + 1 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1379578 + ... + 1379649.

Almost surely, 2^99332172 is an apocalyptic number.

It is an amenable number.

99332172 is an abundant number, since it is smaller than the sum of its proper divisors (151757576).

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

99332172 is a wasteful number, since it uses less digits than its factorization.

99332172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759237 (or 2759232 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 99332172 is about 9966.5526637850. The cubic root of 99332172 is about 463.1233136580.

The spelling of 99332172 in words is "ninety-nine million, three hundred thirty-two thousand, one hundred seventy-two".