138971164 has 6 divisors (see below), whose sum is σ = 243199544. Its totient is φ = 69485580.

The previous prime is 138971153. The next prime is 138971179. The reversal of 138971164 is 461179831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17371392 + ... + 17371399.

Almost surely, 2^138971164 is an apocalyptic number.

It is an amenable number.

138971164 is a deficient number, since it is larger than the sum of its proper divisors (104228380).

138971164 is a wasteful number, since it uses less digits than its factorization.

138971164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34742795 (or 34742793 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 138971164 is about 11788.6031403216. The cubic root of 138971164 is about 517.9743233000.

The spelling of 138971164 in words is "one hundred thirty-eight million, nine hundred seventy-one thousand, one hundred sixty-four".