99395172 has 72 divisors (see below), whose sum is σ = 261922752. Its totient is φ = 31752000.

The previous prime is 99395171. The next prime is 99395173. The reversal of 99395172 is 27159399.

It is a happy number.

99395172 is a `hidden beast` number, since 99 + 395 + 172 = 666.

It is an interprime number because it is at equal distance from previous prime (99395171) and next prime (99395173).

It is not an unprimeable number, because it can be changed into a prime (99395171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94047 + ... + 95097.

It is an arithmetic number, because the mean of its divisors is an integer number (3637816).

Almost surely, 2^99395172 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 99395172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130961376).

99395172 is an abundant number, since it is smaller than the sum of its proper divisors (162527580).

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

99395172 is a wasteful number, since it uses less digits than its factorization.

99395172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169 (or 1164 counting only the distinct ones).

The product of its digits is 153090, while the sum is 45.

The square root of 99395172 is about 9969.7127340761. The cubic root of 99395172 is about 463.2212027307.

The spelling of 99395172 in words is "ninety-nine million, three hundred ninety-five thousand, one hundred seventy-two".