138971692 has 6 divisors (see below), whose sum is σ = 243200468. Its totient is φ = 69485844.

The previous prime is 138971689. The next prime is 138971699. The reversal of 138971692 is 296179831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138971699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17371458 + ... + 17371465.

Almost surely, 2^138971692 is an apocalyptic number.

It is an amenable number.

138971692 is a deficient number, since it is larger than the sum of its proper divisors (104228776).

138971692 is a wasteful number, since it uses less digits than its factorization.

138971692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34742927 (or 34742925 counting only the distinct ones).

The product of its digits is 163296, while the sum is 46.

The square root of 138971692 is about 11788.6255348111. The cubic root of 138971692 is about 517.9749792877.

The spelling of 138971692 in words is "one hundred thirty-eight million, nine hundred seventy-one thousand, six hundred ninety-two".