99171712 has 16 divisors (see below), whose sum is σ = 197568900. Its totient is φ = 49585792.

The previous prime is 99171707. The next prime is 99171713. The reversal of 99171712 is 21717199.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×99171712² = 19670056922021888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99171713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387262 + ... + 387517.

Almost surely, 2^99171712 is an apocalyptic number.

It is an amenable number.

99171712 is a deficient number, since it is larger than the sum of its proper divisors (98397188).

99171712 is an equidigital number, since it uses as much as digits as its factorization.

99171712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774793 (or 774781 counting only the distinct ones).

The product of its digits is 7938, while the sum is 37.

The square root of 99171712 is about 9958.4994853642. The cubic root of 99171712 is about 462.8738046419.

The spelling of 99171712 in words is "ninety-nine million, one hundred seventy-one thousand, seven hundred twelve".