99765998 has 16 divisors (see below), whose sum is σ = 162608640. Its totient is φ = 45732600.

The previous prime is 99765989. The next prime is 99766031. The reversal of 99765998 is 89956799.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a self number, because there is not a number n which added to its sum of digits gives 99765998.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 41168 + ... + 43523.

It is an arithmetic number, because the mean of its divisors is an integer number (10163040).

Almost surely, 2^99765998 is an apocalyptic number.

99765998 is a deficient number, since it is larger than the sum of its proper divisors (62842642).

99765998 is a wasteful number, since it uses less digits than its factorization.

99765998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84743.

The product of its digits is 11022480, while the sum is 62.

The square root of 99765998 is about 9988.2930473630. The cubic root of 99765998 is about 463.7965535711.

The spelling of 99765998 in words is "ninety-nine million, seven hundred sixty-five thousand, nine hundred ninety-eight".