139979836 has 48 divisors (see below), whose sum is σ = 266069664. Its totient is φ = 64198656.

The previous prime is 139979831. The next prime is 139979857. The reversal of 139979836 is 638979931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139979831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 809046 + ... + 809218.

It is an arithmetic number, because the mean of its divisors is an integer number (5543118).

Almost surely, 2^139979836 is an apocalyptic number.

It is an amenable number.

139979836 is a deficient number, since it is larger than the sum of its proper divisors (126089828).

139979836 is a wasteful number, since it uses less digits than its factorization.

139979836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 428 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 55.

The square root of 139979836 is about 11831.3074509963. The cubic root of 139979836 is about 519.2244800713.

The spelling of 139979836 in words is "one hundred thirty-nine million, nine hundred seventy-nine thousand, eight hundred thirty-six".