138203113 has 12 divisors (see below), whose sum is σ = 145723968. Its totient is φ = 130821240.

The previous prime is 138203083. The next prime is 138203141. The reversal of 138203113 is 311302831.

It is not a de Polignac number, because 138203113 - 2⁹ = 138202601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138203413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444228 + ... + 444538.

It is an arithmetic number, because the mean of its divisors is an integer number (12143664).

Almost surely, 2^138203113 is an apocalyptic number.

It is an amenable number.

138203113 is a deficient number, since it is larger than the sum of its proper divisors (7520855).

138203113 is an equidigital number, since it uses as much as digits as its factorization.

138203113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 138203113 is about 11755.9820091730. The cubic root of 138203113 is about 517.0183315672.

Adding to 138203113 its reverse (311302831), we get a palindrome (449505944).

The spelling of 138203113 in words is "one hundred thirty-eight million, two hundred three thousand, one hundred thirteen".