139523912 has 16 divisors (see below), whose sum is σ = 285390000. Its totient is φ = 63419920.

The previous prime is 139523899. The next prime is 139523941. The reversal of 139523912 is 219325931.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 792662 + ... + 792837.

It is an arithmetic number, because the mean of its divisors is an integer number (17836875).

Almost surely, 2^139523912 is an apocalyptic number.

It is an amenable number.

139523912 is an abundant number, since it is smaller than the sum of its proper divisors (145866088).

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

139523912 is a wasteful number, since it uses less digits than its factorization.

139523912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585516 (or 1585512 counting only the distinct ones).

The product of its digits is 14580, while the sum is 35.

The square root of 139523912 is about 11812.0240433213. The cubic root of 139523912 is about 518.6601502681.

The spelling of 139523912 in words is "one hundred thirty-nine million, five hundred twenty-three thousand, nine hundred twelve".