139979408 has 10 divisors (see below), whose sum is σ = 271210134. Its totient is φ = 69989696.

The previous prime is 139979393. The next prime is 139979431. The reversal of 139979408 is 804979931.

139979408 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 117245584 + 22733824 = 10828^2 + 4768^2 .

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 as a sum of consecutive naturals, namely, 4374341 + ... + 4374372.

Almost surely, 2^139979408 is an apocalyptic number.

It is an amenable number.

139979408 is a deficient number, since it is larger than the sum of its proper divisors (131230726).

139979408 is an equidigital number, since it uses as much as digits as its factorization.

139979408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8748721 (or 8748715 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 139979408 is about 11831.2893633788. The cubic root of 139979408 is about 519.2239508800.

The spelling of 139979408 in words is "one hundred thirty-nine million, nine hundred seventy-nine thousand, four hundred eight".