317884021 has 12 divisors (see below), whose sum is σ = 398229132. Its totient is φ = 251512128.

The previous prime is 317884019. The next prime is 317884027. The reversal of 317884021 is 120488713.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56415121 + 261468900 = 7511^2 + 16170^2 .

It is not a de Polignac number, because 317884021 - 2¹ = 317884019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317884027) 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, 248880 + ... + 250153.

It is an arithmetic number, because the mean of its divisors is an integer number (33185761).

Almost surely, 2^317884021 is an apocalyptic number.

It is an amenable number.

317884021 is a deficient number, since it is larger than the sum of its proper divisors (80345111).

317884021 is a wasteful number, since it uses less digits than its factorization.

317884021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499060 (or 499053 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 317884021 is about 17829.3023138877. The cubic root of 317884021 is about 682.4794295794.

The spelling of 317884021 in words is "three hundred seventeen million, eight hundred eighty-four thousand, twenty-one".