139257692 has 24 divisors (see below), whose sum is σ = 278982144. Its totient is φ = 59581872.

The previous prime is 139257661. The next prime is 139257719. The reversal of 139257692 is 296752931.

139257692 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 14273 + ... + 21959.

It is an arithmetic number, because the mean of its divisors is an integer number (11624256).

Almost surely, 2^139257692 is an apocalyptic number.

It is an amenable number.

139257692 is an abundant number, since it is smaller than the sum of its proper divisors (139724452).

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

139257692 is a wasteful number, since it uses less digits than its factorization.

139257692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8345 (or 8343 counting only the distinct ones).

The product of its digits is 204120, while the sum is 44.

The square root of 139257692 is about 11800.7496372053. The cubic root of 139257692 is about 518.3300620020.

The spelling of 139257692 in words is "one hundred thirty-nine million, two hundred fifty-seven thousand, six hundred ninety-two".