99405172 has 12 divisors (see below), whose sum is σ = 181522656. Its totient is φ = 47541560.

The previous prime is 99405167. The next prime is 99405179. The reversal of 99405172 is 27150499.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99405179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540154 + ... + 540337.

It is an arithmetic number, because the mean of its divisors is an integer number (15126888).

Almost surely, 2^99405172 is an apocalyptic number.

99405172 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

99405172 is a deficient number, since it is larger than the sum of its proper divisors (82117484).

99405172 is a wasteful number, since it uses less digits than its factorization.

99405172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080518 (or 1080516 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 99405172 is about 9970.2142404263. The cubic root of 99405172 is about 463.2367368745.

The spelling of 99405172 in words is "ninety-nine million, four hundred five thousand, one hundred seventy-two".