317916762421 has 2 divisors, whose sum is σ = 317916762422. Its totient is φ = 317916762420.

The previous prime is 317916762403. The next prime is 317916762481. The reversal of 317916762421 is 124267619713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289384823025 + 28531939396 = 537945^2 + 168914^2 .

It is an emirp because it is prime and its reverse (124267619713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317916762421 - 2⁵ = 317916762389 is a prime.

It is a super-3 number, since 3×317916762421³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317916762481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158958381210 + 158958381211.

It is an arithmetic number, because the mean of its divisors is an integer number (158958381211).

Almost surely, 2^317916762421 is an apocalyptic number.

It is an amenable number.

317916762421 is a deficient number, since it is larger than the sum of its proper divisors (1).

317916762421 is an equidigital number, since it uses as much as digits as its factorization.

317916762421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The spelling of 317916762421 in words is "three hundred seventeen billion, nine hundred sixteen million, seven hundred sixty-two thousand, four hundred twenty-one".