99979942 has 24 divisors (see below), whose sum is σ = 159821424. Its totient is φ = 46887984.

The previous prime is 99979933. The next prime is 99979961. The reversal of 99979942 is 24997999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55183 + ... + 56965.

It is an arithmetic number, because the mean of its divisors is an integer number (6659226).

Almost surely, 2^99979942 is an apocalyptic number.

99979942 is a deficient number, since it is larger than the sum of its proper divisors (59841482).

99979942 is a wasteful number, since it uses less digits than its factorization.

99979942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884 (or 1861 counting only the distinct ones).

The product of its digits is 3306744, while the sum is 58.

The square root of 99979942 is about 9998.9970497045. The cubic root of 99979942 is about 464.1278476232.

The spelling of 99979942 in words is "ninety-nine million, nine hundred seventy-nine thousand, nine hundred forty-two".