99839142 has 40 divisors (see below), whose sum is σ = 240927456. Its totient is φ = 30719088.

The previous prime is 99839137. The next prime is 99839153. The reversal of 99839142 is 24193899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21598 + ... + 25809.

Almost surely, 2^99839142 is an apocalyptic number.

99839142 is an abundant number, since it is smaller than the sum of its proper divisors (141088314).

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

99839142 is a wasteful number, since it uses less digits than its factorization.

99839142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47434 (or 47425 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 99839142 is about 9991.9538629840. The cubic root of 99839142 is about 463.9098708958.

The spelling of 99839142 in words is "ninety-nine million, eight hundred thirty-nine thousand, one hundred forty-two".