138502613 has 8 divisors (see below), whose sum is σ = 143131296. Its totient is φ = 133938000.

The previous prime is 138502547. The next prime is 138502667. The reversal of 138502613 is 316205831.

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 138502613 - 2¹⁶ = 138437077 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 (135502613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11603 + ... + 20288.

It is an arithmetic number, because the mean of its divisors is an integer number (17891412).

Almost surely, 2^138502613 is an apocalyptic number.

It is an amenable number.

138502613 is a deficient number, since it is larger than the sum of its proper divisors (4628683).

138502613 is a wasteful number, since it uses less digits than its factorization.

138502613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32035.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 138502613 is about 11768.7133111483. The cubic root of 138502613 is about 517.3915389552.

The spelling of 138502613 in words is "one hundred thirty-eight million, five hundred two thousand, six hundred thirteen".