317617661 has 16 divisors (see below), whose sum is σ = 346176000. Its totient is φ = 290304000.

The previous prime is 317617637. The next prime is 317617669. The reversal of 317617661 is 166716713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317617661 is a prime.

It is a super-2 number, since 2×317617661² = 201761957158221842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317617669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263861 + ... + 265061.

It is an arithmetic number, because the mean of its divisors is an integer number (21636000).

Almost surely, 2^317617661 is an apocalyptic number.

317617661 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

317617661 is a deficient number, since it is larger than the sum of its proper divisors (28558339).

317617661 is a wasteful number, since it uses less digits than its factorization.

317617661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700.

The product of its digits is 31752, while the sum is 38.

The square root of 317617661 is about 17821.8310226531. The cubic root of 317617661 is about 682.2887562457.

The spelling of 317617661 in words is "three hundred seventeen million, six hundred seventeen thousand, six hundred sixty-one".