138613645 has 8 divisors (see below), whose sum is σ = 175091040. Its totient is φ = 105054480.

The previous prime is 138613577. The next prime is 138613667. The reversal of 138613645 is 546316831.

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

It is not a de Polignac number, because 138613645 - 2⁹ = 138613133 is a prime.

It is a super-3 number, since 3×138613645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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, 729451 + ... + 729640.

It is an arithmetic number, because the mean of its divisors is an integer number (21886380).

Almost surely, 2^138613645 is an apocalyptic number.

It is an amenable number.

138613645 is a deficient number, since it is larger than the sum of its proper divisors (36477395).

138613645 is a wasteful number, since it uses less digits than its factorization.

138613645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459115.

The product of its digits is 51840, while the sum is 37.

The square root of 138613645 is about 11773.4296192741. The cubic root of 138613645 is about 517.5297593877.

The spelling of 138613645 in words is "one hundred thirty-eight million, six hundred thirteen thousand, six hundred forty-five".