138923692 has 12 divisors (see below), whose sum is σ = 243488896. Its totient is φ = 69355440.

The previous prime is 138923683. The next prime is 138923693. The reversal of 138923692 is 296329831.

138923692 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138923693) 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, 23628 + ... + 28915.

Almost surely, 2^138923692 is an apocalyptic number.

It is an amenable number.

138923692 is a deficient number, since it is larger than the sum of its proper divisors (104565204).

138923692 is a wasteful number, since it uses less digits than its factorization.

138923692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53208 (or 53206 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 138923692 is about 11786.5894982391. The cubic root of 138923692 is about 517.9153372563.

The spelling of 138923692 in words is "one hundred thirty-eight million, nine hundred twenty-three thousand, six hundred ninety-two".