138595617 has 20 divisors (see below), whose sum is σ = 207676656. Its totient is φ = 92112120.

The previous prime is 138595591. The next prime is 138595657. The reversal of 138595617 is 716595831.

It is a happy number.

138595617 is a `hidden beast` number, since 1 + 3 + 85 + 9 + 561 + 7 = 666.

It is not a de Polignac number, because 138595617 - 2⁷ = 138595489 is a prime.

It is a super-2 number, since 2×138595617² = 38417490103221378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138595657) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25642 + ... + 30572.

Almost surely, 2^138595617 is an apocalyptic number.

It is an amenable number.

138595617 is a deficient number, since it is larger than the sum of its proper divisors (69081039).

138595617 is an equidigital number, since it uses as much as digits as its factorization.

138595617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5290 (or 5281 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 138595617 is about 11772.6639721008. The cubic root of 138595617 is about 517.5073218876.

The spelling of 138595617 in words is "one hundred thirty-eight million, five hundred ninety-five thousand, six hundred seventeen".