99928775 has 12 divisors (see below), whose sum is σ = 126794712. Its totient is φ = 78083040.

The previous prime is 99928769. The next prime is 99928781. The reversal of 99928775 is 57782999.

It is an interprime number because it is at equal distance from previous prime (99928769) and next prime (99928781).

It is a de Polignac number, because none of the positive numbers 2^k-99928775 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99928775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45404 + ... + 47553.

It is an arithmetic number, because the mean of its divisors is an integer number (10566226).

Almost surely, 2^99928775 is an apocalyptic number.

99928775 is a deficient number, since it is larger than the sum of its proper divisors (26865937).

99928775 is a wasteful number, since it uses less digits than its factorization.

99928775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93010 (or 93005 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 56.

The square root of 99928775 is about 9996.4381156490. The cubic root of 99928775 is about 464.0486581329.

The spelling of 99928775 in words is "ninety-nine million, nine hundred twenty-eight thousand, seven hundred seventy-five".