138331613 has 8 divisors (see below), whose sum is σ = 158226240. Its totient is φ = 118470240.

The previous prime is 138331597. The next prime is 138331619. The reversal of 138331613 is 316133831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138331613 - 2⁴ = 138331597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138331619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1358 + ... + 16688.

It is an arithmetic number, because the mean of its divisors is an integer number (19778280).

Almost surely, 2^138331613 is an apocalyptic number.

It is an amenable number.

138331613 is a deficient number, since it is larger than the sum of its proper divisors (19894627).

138331613 is a wasteful number, since it uses less digits than its factorization.

138331613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16627.

The product of its digits is 3888, while the sum is 29.

The square root of 138331613 is about 11761.4460420477. The cubic root of 138331613 is about 517.1785215803.

The spelling of 138331613 in words is "one hundred thirty-eight million, three hundred thirty-one thousand, six hundred thirteen".