99718165 has 12 divisors (see below), whose sum is σ = 123652332. Its totient is φ = 77197440.

The previous prime is 99718159. The next prime is 99718187. The reversal of 99718165 is 56181799.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 33246756 + 66471409 = 5766^2 + 8153^2 .

It is not a de Polignac number, because 99718165 - 2¹⁷ = 99587093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 5572 + ... + 15181.

It is an arithmetic number, because the mean of its divisors is an integer number (10304361).

Almost surely, 2^99718165 is an apocalyptic number.

It is an amenable number.

99718165 is a deficient number, since it is larger than the sum of its proper divisors (23934167).

99718165 is a wasteful number, since it uses less digits than its factorization.

99718165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20820 (or 20789 counting only the distinct ones).

The product of its digits is 136080, while the sum is 46.

The square root of 99718165 is about 9985.8983071129. The cubic root of 99718165 is about 463.7224190047.

The spelling of 99718165 in words is "ninety-nine million, seven hundred eighteen thousand, one hundred sixty-five".