317875661 has 4 divisors (see below), whose sum is σ = 318313632. Its totient is φ = 317437692.

The previous prime is 317875637. The next prime is 317875669. The reversal of 317875661 is 166578713.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317875661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317875669) 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, 217895 + ... + 219348.

It is an arithmetic number, because the mean of its divisors is an integer number (79578408).

Almost surely, 2^317875661 is an apocalyptic number.

It is an amenable number.

317875661 is a deficient number, since it is larger than the sum of its proper divisors (437971).

317875661 is an equidigital number, since it uses as much as digits as its factorization.

317875661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437970.

The product of its digits is 211680, while the sum is 44.

The square root of 317875661 is about 17829.0678668292. The cubic root of 317875661 is about 682.4734467076.

The spelling of 317875661 in words is "three hundred seventeen million, eight hundred seventy-five thousand, six hundred sixty-one".