138131164 has 12 divisors (see below), whose sum is σ = 249527488. Its totient is φ = 66837600.

The previous prime is 138131143. The next prime is 138131183. The reversal of 138131164 is 461131831.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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, 556857 + ... + 557104.

Almost surely, 2^138131164 is an apocalyptic number.

It is an amenable number.

138131164 is a deficient number, since it is larger than the sum of its proper divisors (111396324).

138131164 is a wasteful number, since it uses less digits than its factorization.

138131164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113996 (or 1113994 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 138131164 is about 11752.9215091398. The cubic root of 138131164 is about 516.9285955058.

Adding to 138131164 its reverse (461131831), we get a palindrome (599262995).

The spelling of 138131164 in words is "one hundred thirty-eight million, one hundred thirty-one thousand, one hundred sixty-four".