138713851 has 24 divisors (see below), whose sum is σ = 157184720. Its totient is φ = 121974336.

The previous prime is 138713843. The next prime is 138713857. The reversal of 138713851 is 158317831.

138713851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138713851 - 2³ = 138713843 is a prime.

It is a super-4 number, since 4×138713851⁴ (a number of 34 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 138713851.

It is not an unprimeable number, because it can be changed into a prime (138713857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 371701 + ... + 372073.

Almost surely, 2^138713851 is an apocalyptic number.

138713851 is a deficient number, since it is larger than the sum of its proper divisors (18470869).

138713851 is a wasteful number, since it uses less digits than its factorization.

138713851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 452 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 138713851 is about 11777.6844498399. The cubic root of 138713851 is about 517.6544395022.

The spelling of 138713851 in words is "one hundred thirty-eight million, seven hundred thirteen thousand, eight hundred fifty-one".