99439678 has 16 divisors (see below), whose sum is σ = 164552976. Its totient is φ = 44775360.

The previous prime is 99439667. The next prime is 99439709. The reversal of 99439678 is 87693499.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45576 + ... + 47707.

It is an arithmetic number, because the mean of its divisors is an integer number (10284561).

Almost surely, 2^99439678 is an apocalyptic number.

99439678 is a deficient number, since it is larger than the sum of its proper divisors (65113298).

99439678 is a wasteful number, since it uses less digits than its factorization.

99439678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93339.

The product of its digits is 2939328, while the sum is 55.

The square root of 99439678 is about 9971.9445445710. The cubic root of 99439678 is about 463.2903309929.

The spelling of 99439678 in words is "ninety-nine million, four hundred thirty-nine thousand, six hundred seventy-eight".