99758879 has 16 divisors (see below), whose sum is σ = 111780000. Its totient is φ = 88258560.

The previous prime is 99758849. The next prime is 99758903. The reversal of 99758879 is 97885799.

It is a cyclic number.

It is not a de Polignac number, because 99758879 - 2¹² = 99754783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99758809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79247 + ... + 80495.

It is an arithmetic number, because the mean of its divisors is an integer number (6986250).

Almost surely, 2^99758879 is an apocalyptic number.

99758879 is a deficient number, since it is larger than the sum of its proper divisors (12021121).

99758879 is a wasteful number, since it uses less digits than its factorization.

99758879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450.

The product of its digits is 11430720, while the sum is 62.

The square root of 99758879 is about 9987.9366738081. The cubic root of 99758879 is about 463.7855216020.

Subtracting from 99758879 its reverse (97885799), we obtain a triangular number (1873080 = T₁₉₃₅).

The spelling of 99758879 in words is "ninety-nine million, seven hundred fifty-eight thousand, eight hundred seventy-nine".