138959313 has 4 divisors (see below), whose sum is σ = 185279088. Its totient is φ = 92639540.

The previous prime is 138959299. The next prime is 138959323. The reversal of 138959313 is 313959831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313959831 = 3 ⋅104653277.

It is a cyclic number.

It is not a de Polignac number, because 138959313 - 2⁴ = 138959297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138959323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23159883 + ... + 23159888.

It is an arithmetic number, because the mean of its divisors is an integer number (46319772).

Almost surely, 2^138959313 is an apocalyptic number.

It is an amenable number.

138959313 is a deficient number, since it is larger than the sum of its proper divisors (46319775).

138959313 is an equidigital number, since it uses as much as digits as its factorization.

138959313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46319774.

The product of its digits is 87480, while the sum is 42.

The square root of 138959313 is about 11788.1004831143. The cubic root of 138959313 is about 517.9595991706.

The spelling of 138959313 in words is "one hundred thirty-eight million, nine hundred fifty-nine thousand, three hundred thirteen".