97879999 has 12 divisors (see below), whose sum is σ = 120559104. Its totient is φ = 78961344.

The previous prime is 97879993. The next prime is 97880011. The reversal of 97879999 is 99997879.

It is not a de Polignac number, because 97879999 - 2⁵ = 97879967 is a prime.

97879999 is a modest number, since divided by 9999 gives 9787 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97879993) 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, 57919 + ... + 59584.

It is an arithmetic number, because the mean of its divisors is an integer number (10046592).

Almost surely, 2^97879999 is an apocalyptic number.

97879999 is a deficient number, since it is larger than the sum of its proper divisors (22679105).

97879999 is a wasteful number, since it uses less digits than its factorization.

97879999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117534 (or 117527 counting only the distinct ones).

The product of its digits is 23147208, while the sum is 67.

The square root of 97879999 is about 9893.4321142867. The cubic root of 97879999 is about 460.8553697023.

The spelling of 97879999 in words is "ninety-seven million, eight hundred seventy-nine thousand, nine hundred ninety-nine".