139979912 has 36 divisors (see below), whose sum is σ = 271212405. Its totient is φ = 67731136.

The previous prime is 139979899. The next prime is 139979947. The reversal of 139979912 is 219979931.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 125126596 + 14853316 = 11186^2 + 3854^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8366.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 1572764 + ... + 1572852.

Almost surely, 2^139979912 is an apocalyptic number.

It is an amenable number.

139979912 is a deficient number, since it is larger than the sum of its proper divisors (131232493).

139979912 is an frugal number, since it uses more digits than its factorization.

139979912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 138 counting only the distinct ones).

The product of its digits is 275562, while the sum is 50.

The square root of 139979912 is about 11831.3106628133. The cubic root of 139979912 is about 519.2245740397.

Multiplying 139979912 by its sum of digits (50), we get a square (6998995600 = 83660²).

The spelling of 139979912 in words is "one hundred thirty-nine million, nine hundred seventy-nine thousand, nine hundred twelve".