99249813 has 24 divisors (see below), whose sum is σ = 159224640. Its totient is φ = 61074000.

The previous prime is 99249797. The next prime is 99249881. The reversal of 99249813 is 31894299.

It is not a de Polignac number, because 99249813 - 2⁴ = 99249797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99249113) 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, 6313 + ... + 15438.

It is an arithmetic number, because the mean of its divisors is an integer number (6634360).

Almost surely, 2^99249813 is an apocalyptic number.

It is an amenable number.

99249813 is a deficient number, since it is larger than the sum of its proper divisors (59974827).

99249813 is a wasteful number, since it uses less digits than its factorization.

99249813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21786 (or 21767 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 99249813 is about 9962.4200373202. The cubic root of 99249813 is about 462.9952822300.

It can be divided in two parts, 992 and 49813, that added together give a palindrome (50805).

The spelling of 99249813 in words is "ninety-nine million, two hundred forty-nine thousand, eight hundred thirteen".