617381613 has 12 divisors (see below), whose sum is σ = 910747968. Its totient is φ = 402830280.

The previous prime is 617381587. The next prime is 617381621. The reversal of 617381613 is 316183716.

617381613 is a `hidden beast` number, since 6 + 1 + 7 + 38 + 1 + 613 = 666.

It is not a de Polignac number, because 617381613 - 2⁵ = 617381581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617381113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 729343 + ... + 730188.

It is an arithmetic number, because the mean of its divisors is an integer number (75895664).

Almost surely, 2^617381613 is an apocalyptic number.

It is an amenable number.

617381613 is a deficient number, since it is larger than the sum of its proper divisors (293366355).

617381613 is a wasteful number, since it uses less digits than its factorization.

617381613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459584 (or 1459581 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 617381613 is about 24847.1650898045. The cubic root of 617381613 is about 851.4998262769.

The spelling of 617381613 in words is "six hundred seventeen million, three hundred eighty-one thousand, six hundred thirteen".