139173912 has 48 divisors (see below), whose sum is σ = 378757080. Its totient is φ = 46166400.

The previous prime is 139173901. The next prime is 139173949. The reversal of 139173912 is 219371931.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10612 + ... + 19772.

Almost surely, 2^139173912 is an apocalyptic number.

139173912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139173912 is an abundant number, since it is smaller than the sum of its proper divisors (239583168).

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

139173912 is a wasteful number, since it uses less digits than its factorization.

139173912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9384 (or 9377 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 139173912 is about 11797.1993286542. The cubic root of 139173912 is about 518.2260955030.

The spelling of 139173912 in words is "one hundred thirty-nine million, one hundred seventy-three thousand, nine hundred twelve".