138412813 has 16 divisors (see below), whose sum is σ = 173047680. Its totient is φ = 107553600.

The previous prime is 138412789. The next prime is 138412831. The reversal of 138412813 is 318214831.

It is a de Polignac number, because none of the positive numbers 2^k-138412813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138412913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27643 + ... + 32263.

It is an arithmetic number, because the mean of its divisors is an integer number (10815480).

Almost surely, 2^138412813 is an apocalyptic number.

It is an amenable number.

138412813 is a deficient number, since it is larger than the sum of its proper divisors (34634867).

138412813 is a wasteful number, since it uses less digits than its factorization.

138412813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028.

The product of its digits is 4608, while the sum is 31.

The square root of 138412813 is about 11764.8974921161. The cubic root of 138412813 is about 517.2796955655.

The spelling of 138412813 in words is "one hundred thirty-eight million, four hundred twelve thousand, eight hundred thirteen".