138635513 has 8 divisors (see below), whose sum is σ = 146017728. Its totient is φ = 131366224.

The previous prime is 138635489. The next prime is 138635537. The reversal of 138635513 is 315536831.

It is an interprime number because it is at equal distance from previous prime (138635489) and next prime (138635537).

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 138635513 - 2⁸ = 138635257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138635593) 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 7 ways as a sum of consecutive naturals, for example, 25706 + ... + 30627.

It is an arithmetic number, because the mean of its divisors is an integer number (18252216).

Almost surely, 2^138635513 is an apocalyptic number.

It is an amenable number.

138635513 is a deficient number, since it is larger than the sum of its proper divisors (7382215).

138635513 is a wasteful number, since it uses less digits than its factorization.

138635513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56463.

The product of its digits is 32400, while the sum is 35.

The square root of 138635513 is about 11774.3582840000. The cubic root of 138635513 is about 517.5569735091.

The spelling of 138635513 in words is "one hundred thirty-eight million, six hundred thirty-five thousand, five hundred thirteen".