138613513 has 8 divisors (see below), whose sum is σ = 140806080. Its totient is φ = 136427760.

The previous prime is 138613469. The next prime is 138613567. The reversal of 138613513 is 315316831.

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

It is a cyclic number.

It is not a de Polignac number, because 138613513 - 2⁹ = 138613001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138613313) 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, 52458 + ... + 55036.

It is an arithmetic number, because the mean of its divisors is an integer number (17600760).

Almost surely, 2^138613513 is an apocalyptic number.

It is an amenable number.

138613513 is a deficient number, since it is larger than the sum of its proper divisors (2192567).

138613513 is an equidigital number, since it uses as much as digits as its factorization.

138613513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407.

The product of its digits is 6480, while the sum is 31.

The square root of 138613513 is about 11773.4240134296. The cubic root of 138613513 is about 517.5295951086.

The spelling of 138613513 in words is "one hundred thirty-eight million, six hundred thirteen thousand, five hundred thirteen".