138876313 has 4 divisors (see below), whose sum is σ = 140251428. Its totient is φ = 137501200.

The previous prime is 138876299. The next prime is 138876317. The reversal of 138876313 is 313678831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113039424 + 25836889 = 10632^2 + 5083^2 .

It is a cyclic number.

It is not a de Polignac number, because 138876313 - 2¹⁷ = 138745241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138876317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687406 + ... + 687607.

It is an arithmetic number, because the mean of its divisors is an integer number (35062857).

Almost surely, 2^138876313 is an apocalyptic number.

It is an amenable number.

138876313 is a deficient number, since it is larger than the sum of its proper divisors (1375115).

138876313 is a wasteful number, since it uses less digits than its factorization.

138876313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375114.

The product of its digits is 72576, while the sum is 40.

The square root of 138876313 is about 11784.5794579187. The cubic root of 138876313 is about 517.8564533696.

The spelling of 138876313 in words is "one hundred thirty-eight million, eight hundred seventy-six thousand, three hundred thirteen".