99612172 has 48 divisors (see below), whose sum is σ = 199729152. Its totient is φ = 43028480.

The previous prime is 99612167. The next prime is 99612179. The reversal of 99612172 is 27121699.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (99612179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259893 + ... + 260275.

It is an arithmetic number, because the mean of its divisors is an integer number (4161024).

Almost surely, 2^99612172 is an apocalyptic number.

99612172 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

99612172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

99612172 is a wasteful number, since it uses less digits than its factorization.

99612172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 676 counting only the distinct ones).

The product of its digits is 13608, while the sum is 37.

The square root of 99612172 is about 9980.5897621333. The cubic root of 99612172 is about 463.5580599320.

The spelling of 99612172 in words is "ninety-nine million, six hundred twelve thousand, one hundred seventy-two".