139517912 has 32 divisors (see below), whose sum is σ = 291567600. Its totient is φ = 62198784.

The previous prime is 139517909. The next prime is 139517933. The reversal of 139517912 is 219715931.

139517912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

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, 24413 + ... + 29580.

Almost surely, 2^139517912 is an apocalyptic number.

It is an amenable number.

139517912 is an abundant number, since it is smaller than the sum of its proper divisors (152049688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139517912 is a wasteful number, since it uses less digits than its factorization.

139517912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54035 (or 54031 counting only the distinct ones).

The product of its digits is 17010, while the sum is 38.

The square root of 139517912 is about 11811.7700621033. The cubic root of 139517912 is about 518.6527154481.

The spelling of 139517912 in words is "one hundred thirty-nine million, five hundred seventeen thousand, nine hundred twelve".