138090013 has 4 divisors (see below), whose sum is σ = 138682908. Its totient is φ = 137497120.

The previous prime is 138090011. The next prime is 138090019. The reversal of 138090013 is 310090831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310090831 = 41 ⋅7563191.

It can be written as a sum of positive squares in 2 ways, for example, as 66145689 + 71944324 = 8133^2 + 8482^2 .

It is a cyclic number.

It is not a de Polignac number, because 138090013 - 2¹ = 138090011 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 138090013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138090011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296098 + ... + 296563.

It is an arithmetic number, because the mean of its divisors is an integer number (34670727).

Almost surely, 2^138090013 is an apocalyptic number.

It is an amenable number.

138090013 is a deficient number, since it is larger than the sum of its proper divisors (592895).

138090013 is an equidigital number, since it uses as much as digits as its factorization.

138090013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592894.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 138090013 is about 11751.1707076359. The cubic root of 138090013 is about 516.8772572444.

The spelling of 138090013 in words is "one hundred thirty-eight million, ninety thousand, thirteen".