99879942 has 8 divisors (see below), whose sum is σ = 199759896. Its totient is φ = 33293312.

The previous prime is 99879919. The next prime is 99879943. The reversal of 99879942 is 24997899.

It is a sphenic number, since it is the product of 3 distinct primes.

99879942 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99879943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8323323 + ... + 8323334.

It is an arithmetic number, because the mean of its divisors is an integer number (24969987).

Almost surely, 2^99879942 is an apocalyptic number.

99879942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99879942 is a wasteful number, since it uses less digits than its factorization.

99879942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16646662.

The product of its digits is 2939328, while the sum is 57.

The square root of 99879942 is about 9993.9952971772. The cubic root of 99879942 is about 463.9730556837.

The spelling of 99879942 in words is "ninety-nine million, eight hundred seventy-nine thousand, nine hundred forty-two".