138879974 has 8 divisors (see below), whose sum is σ = 208434600. Its totient is φ = 69401776.

The previous prime is 138879943. The next prime is 138879991. The reversal of 138879974 is 479978831.

138879974 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 14324 + ... + 21975.

It is an arithmetic number, because the mean of its divisors is an integer number (26054325).

Almost surely, 2^138879974 is an apocalyptic number.

138879974 is a deficient number, since it is larger than the sum of its proper divisors (69554626).

138879974 is a wasteful number, since it uses less digits than its factorization.

138879974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38214.

The product of its digits is 3048192, while the sum is 56.

The square root of 138879974 is about 11784.7347870031. The cubic root of 138879974 is about 517.8610038355.

The spelling of 138879974 in words is "one hundred thirty-eight million, eight hundred seventy-nine thousand, nine hundred seventy-four".