139879539 has 24 divisors (see below), whose sum is σ = 213595200. Its totient is φ = 87966000.

The previous prime is 139879511. The next prime is 139879541. The reversal of 139879539 is 935978931.

139879539 is a `hidden beast` number, since 1 + 39 + 8 + 79 + 539 = 666.

It is not a de Polignac number, because 139879539 - 2⁵ = 139879507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139879589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41292 + ... + 44550.

It is an arithmetic number, because the mean of its divisors is an integer number (8899800).

Almost surely, 2^139879539 is an apocalyptic number.

139879539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

139879539 is a deficient number, since it is larger than the sum of its proper divisors (73715661).

139879539 is a wasteful number, since it uses less digits than its factorization.

139879539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535 (or 3532 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 139879539 is about 11827.0680644021. The cubic root of 139879539 is about 519.1004405383.

The spelling of 139879539 in words is "one hundred thirty-nine million, eight hundred seventy-nine thousand, five hundred thirty-nine".