139293912 has 32 divisors (see below), whose sum is σ = 359470080. Its totient is φ = 44933280.

The previous prime is 139293893. The next prime is 139293923. The reversal of 139293912 is 219392931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92868 + ... + 94355.

It is an arithmetic number, because the mean of its divisors is an integer number (11233440).

Almost surely, 2^139293912 is an apocalyptic number.

139293912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139293912 is an abundant number, since it is smaller than the sum of its proper divisors (220176168).

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

139293912 is a wasteful number, since it uses less digits than its factorization.

139293912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187263 (or 187259 counting only the distinct ones).

The product of its digits is 26244, while the sum is 39.

The square root of 139293912 is about 11802.2841856990. The cubic root of 139293912 is about 518.3749961744.

The spelling of 139293912 in words is "one hundred thirty-nine million, two hundred ninety-three thousand, nine hundred twelve".