99804879 has 20 divisors (see below), whose sum is σ = 149715720. Its totient is φ = 66258000.

The previous prime is 99804827. The next prime is 99804893. The reversal of 99804879 is 97840899.

It is not a de Polignac number, because 99804879 - 2¹¹ = 99802831 is a prime.

It is a super-2 number, since 2×99804879² = 19922027744409282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99804079) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17877 + ... + 22785.

It is an arithmetic number, because the mean of its divisors is an integer number (7485786).

Almost surely, 2^99804879 is an apocalyptic number.

99804879 is a deficient number, since it is larger than the sum of its proper divisors (49910841).

99804879 is a wasteful number, since it uses less digits than its factorization.

99804879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5172 (or 5163 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 99804879 is about 9990.2391863258. The cubic root of 99804879 is about 463.8567963126.

The spelling of 99804879 in words is "ninety-nine million, eight hundred four thousand, eight hundred seventy-nine".