138764157 has 16 divisors (see below), whose sum is σ = 212140032. Its totient is φ = 79035120.

The previous prime is 138764111. The next prime is 138764161. The reversal of 138764157 is 751467831.

It is not a de Polignac number, because 138764157 - 2¹⁶ = 138698621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138764057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4093 + ... + 17154.

It is an arithmetic number, because the mean of its divisors is an integer number (13258752).

Almost surely, 2^138764157 is an apocalyptic number.

It is an amenable number.

138764157 is a deficient number, since it is larger than the sum of its proper divisors (73375875).

138764157 is a wasteful number, since it uses less digits than its factorization.

138764157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21568.

The product of its digits is 141120, while the sum is 42.

The square root of 138764157 is about 11779.8199052447. The cubic root of 138764157 is about 517.7170095018.

The spelling of 138764157 in words is "one hundred thirty-eight million, seven hundred sixty-four thousand, one hundred fifty-seven".