99939970 has 32 divisors (see below), whose sum is σ = 199987200. Its totient is φ = 35709120.

The previous prime is 99939967. The next prime is 99940007. The reversal of 99939970 is 7993999.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8370 + ... + 16429.

It is an arithmetic number, because the mean of its divisors is an integer number (6249600).

Almost surely, 2^99939970 is an apocalyptic number.

99939970 is an abundant number, since it is smaller than the sum of its proper divisors (100047230).

99939970 is a wasteful number, since it uses less digits than its factorization.

99939970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24850.

The product of its (nonzero) digits is 1240029, while the sum is 55.

The square root of 99939970 is about 9996.9980494146. The cubic root of 99939970 is about 464.0659865776.

The spelling of 99939970 in words is "ninety-nine million, nine hundred thirty-nine thousand, nine hundred seventy".