138877617 has 8 divisors (see below), whose sum is σ = 185291680. Its totient is φ = 92524320.

The previous prime is 138877597. The next prime is 138877637. The reversal of 138877617 is 716778831.

It is an interprime number because it is at equal distance from previous prime (138877597) and next prime (138877637).

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

It is not a de Polignac number, because 138877617 - 2¹⁰ = 138876593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138877637) 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, 9559 + ... + 19212.

It is an arithmetic number, because the mean of its divisors is an integer number (23161460).

Almost surely, 2^138877617 is an apocalyptic number.

It is an amenable number.

138877617 is a deficient number, since it is larger than the sum of its proper divisors (46414063).

138877617 is a wasteful number, since it uses less digits than its factorization.

138877617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30383.

The product of its digits is 395136, while the sum is 48.

The square root of 138877617 is about 11784.6347843283. The cubic root of 138877617 is about 517.8580741948.

The spelling of 138877617 in words is "one hundred thirty-eight million, eight hundred seventy-seven thousand, six hundred seventeen".