139551938 has 16 divisors (see below), whose sum is σ = 215340984. Its totient is φ = 67777920.

The previous prime is 139551887. The next prime is 139551943. The reversal of 139551938 is 839155931.

It can be written as a sum of positive squares in 4 ways, for example, as 127531849 + 12020089 = 11293^2 + 3467^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59606 + ... + 61902.

Almost surely, 2^139551938 is an apocalyptic number.

139551938 is a deficient number, since it is larger than the sum of its proper divisors (75789046).

139551938 is a wasteful number, since it uses less digits than its factorization.

139551938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157.

The product of its digits is 145800, while the sum is 44.

The square root of 139551938 is about 11813.2103172677. The cubic root of 139551938 is about 518.6948754895.

The spelling of 139551938 in words is "one hundred thirty-nine million, five hundred fifty-one thousand, nine hundred thirty-eight".