317599661 has 4 divisors (see below), whose sum is σ = 336282012. Its totient is φ = 298917312.

The previous prime is 317599643. The next prime is 317599669. The reversal of 317599661 is 166995713.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 187525636 + 130074025 = 13694^2 + 11405^2 .

It is a cyclic number.

It is not a de Polignac number, because 317599661 - 2¹⁰ = 317598637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317599669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9341150 + ... + 9341183.

It is an arithmetic number, because the mean of its divisors is an integer number (84070503).

Almost surely, 2^317599661 is an apocalyptic number.

It is an amenable number.

317599661 is a deficient number, since it is larger than the sum of its proper divisors (18682351).

317599661 is a wasteful number, since it uses less digits than its factorization.

317599661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18682350.

The product of its digits is 306180, while the sum is 47.

The square root of 317599661 is about 17821.3260168821. The cubic root of 317599661 is about 682.2758671329.

The spelling of 317599661 in words is "three hundred seventeen million, five hundred ninety-nine thousand, six hundred sixty-one".