99788913 has 48 divisors (see below), whose sum is σ = 171899520. Its totient is φ = 54577152.

The previous prime is 99788911. The next prime is 99788917. The reversal of 99788913 is 31988799.

It is not a de Polignac number, because 99788913 - 2¹ = 99788911 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 99788913.

It is not an unprimeable number, because it can be changed into a prime (99788911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 352470 + ... + 352752.

It is an arithmetic number, because the mean of its divisors is an integer number (3581240).

Almost surely, 2^99788913 is an apocalyptic number.

It is an amenable number.

99788913 is a deficient number, since it is larger than the sum of its proper divisors (72110607).

99788913 is a wasteful number, since it uses less digits than its factorization.

99788913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 515 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 99788913 is about 9989.4400743986. The cubic root of 99788913 is about 463.8320602722.

The spelling of 99788913 in words is "ninety-nine million, seven hundred eighty-eight thousand, nine hundred thirteen".