99425979 has 12 divisors (see below), whose sum is σ = 152063496. Its totient is φ = 62384832.

The previous prime is 99425951. The next prime is 99425981. The reversal of 99425979 is 97952499.

99425979 is a `hidden beast` number, since 9 + 9 + 42 + 597 + 9 = 666.

It is not a de Polignac number, because 99425979 - 2⁹ = 99425467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99425929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324769 + ... + 325074.

It is an arithmetic number, because the mean of its divisors is an integer number (12671958).

Almost surely, 2^99425979 is an apocalyptic number.

99425979 is a deficient number, since it is larger than the sum of its proper divisors (52637517).

99425979 is a wasteful number, since it uses less digits than its factorization.

99425979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649866 (or 649863 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 99425979 is about 9971.2576438481. The cubic root of 99425979 is about 463.2690554288.

The spelling of 99425979 in words is "ninety-nine million, four hundred twenty-five thousand, nine hundred seventy-nine".