139473912 has 16 divisors (see below), whose sum is σ = 348684840. Its totient is φ = 46491296.

The previous prime is 139473911. The next prime is 139473913. The reversal of 139473912 is 219374931.

It is an interprime number because it is at equal distance from previous prime (139473911) and next prime (139473913).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139473911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2905683 + ... + 2905730.

Almost surely, 2^139473912 is an apocalyptic number.

139473912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139473912 is an abundant number, since it is smaller than the sum of its proper divisors (209210928).

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

139473912 is a wasteful number, since it uses less digits than its factorization.

139473912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5811422 (or 5811418 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 139473912 is about 11809.9073662751. The cubic root of 139473912 is about 518.5981869206.

The spelling of 139473912 in words is "one hundred thirty-nine million, four hundred seventy-three thousand, nine hundred twelve".