138495013 has 4 divisors (see below), whose sum is σ = 139491520. Its totient is φ = 137498508.

The previous prime is 138495001. The next prime is 138495031. The reversal of 138495013 is 310594831.

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: 310594831 = 443 ⋅701117.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138495013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138495013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138495043) 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, 498045 + ... + 498322.

It is an arithmetic number, because the mean of its divisors is an integer number (34872880).

Almost surely, 2^138495013 is an apocalyptic number.

It is an amenable number.

138495013 is a deficient number, since it is larger than the sum of its proper divisors (996507).

138495013 is an equidigital number, since it uses as much as digits as its factorization.

138495013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996506.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 138495013 is about 11768.3904167053. The cubic root of 138495013 is about 517.3820752406.

The spelling of 138495013 in words is "one hundred thirty-eight million, four hundred ninety-five thousand, thirteen".