139392668 has 12 divisors (see below), whose sum is σ = 244069560. Its totient is φ = 69658512.

The previous prime is 139392641. The next prime is 139392677. The reversal of 139392668 is 866293931.

139392668 is digitally balanced in base 3, 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 3 ways as a sum of consecutive naturals, for example, 146 + ... + 16697.

It is an arithmetic number, because the mean of its divisors is an integer number (20339130).

Almost surely, 2^139392668 is an apocalyptic number.

It is an amenable number.

139392668 is a deficient number, since it is larger than the sum of its proper divisors (104676892).

139392668 is a wasteful number, since it uses less digits than its factorization.

139392668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18916 (or 18914 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 139392668 is about 11806.4672108129. The cubic root of 139392668 is about 518.4974723282.

The spelling of 139392668 in words is "one hundred thirty-nine million, three hundred ninety-two thousand, six hundred sixty-eight".