138657113 has 6 divisors (see below), whose sum is σ = 161295066. Its totient is φ = 118848912.

The previous prime is 138657073. The next prime is 138657131. The reversal of 138657113 is 311756831.

138657113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 117570649 + 21086464 = 10843^2 + 4592^2 .

It is not a de Polignac number, because 138657113 - 2¹² = 138653017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138657313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1414820 + ... + 1414917.

It is an arithmetic number, because the mean of its divisors is an integer number (26882511).

Almost surely, 2^138657113 is an apocalyptic number.

It is an amenable number.

138657113 is a deficient number, since it is larger than the sum of its proper divisors (22637953).

138657113 is an equidigital number, since it uses as much as digits as its factorization.

138657113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2829751 (or 2829744 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 138657113 is about 11775.2754957156. The cubic root of 138657113 is about 517.5838513026.

The spelling of 138657113 in words is "one hundred thirty-eight million, six hundred fifty-seven thousand, one hundred thirteen".