317045621 has 2 divisors, whose sum is σ = 317045622. Its totient is φ = 317045620.

The previous prime is 317045611. The next prime is 317045623. The reversal of 317045621 is 126540713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314530225 + 2515396 = 17735^2 + 1586^2 .

It is a cyclic number.

It is not a de Polignac number, because 317045621 - 2¹⁸ = 316783477 is a prime.

It is a Sophie Germain prime.

Together with 317045623, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317045623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158522810 + 158522811.

It is an arithmetic number, because the mean of its divisors is an integer number (158522811).

Almost surely, 2^317045621 is an apocalyptic number.

It is an amenable number.

317045621 is a deficient number, since it is larger than the sum of its proper divisors (1).

317045621 is an equidigital number, since it uses as much as digits as its factorization.

317045621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 317045621 is about 17805.7749339926. The cubic root of 317045621 is about 681.8789018252.

The spelling of 317045621 in words is "three hundred seventeen million, forty-five thousand, six hundred twenty-one".