99613899 has 24 divisors (see below), whose sum is σ = 179392512. Its totient is φ = 51747120.

The previous prime is 99613867. The next prime is 99613937. The reversal of 99613899 is 99831699.

It is not a de Polignac number, because 99613899 - 2⁵ = 99613867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99613799) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71179 + ... + 72564.

It is an arithmetic number, because the mean of its divisors is an integer number (7474688).

Almost surely, 2^99613899 is an apocalyptic number.

99613899 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

99613899 is a deficient number, since it is larger than the sum of its proper divisors (79778613).

99613899 is a wasteful number, since it uses less digits than its factorization.

99613899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143767 (or 143764 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 99613899 is about 9980.6762796917. The cubic root of 99613899 is about 463.5607388554.

The spelling of 99613899 in words is "ninety-nine million, six hundred thirteen thousand, eight hundred ninety-nine".