317978797 has 2 divisors, whose sum is σ = 317978798. Its totient is φ = 317978796.

The previous prime is 317978783. The next prime is 317978803. The reversal of 317978797 is 797879713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 317766276 + 212521 = 17826^2 + 461^2 .

It is an emirp because it is prime and its reverse (797879713) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317978797 is a prime.

It is a super-2 number, since 2×317978797² = 202221030683134418, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317978767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158989398 + 158989399.

It is an arithmetic number, because the mean of its divisors is an integer number (158989399).

Almost surely, 2^317978797 is an apocalyptic number.

It is an amenable number.

317978797 is a deficient number, since it is larger than the sum of its proper divisors (1).

317978797 is an equidigital number, since it uses as much as digits as its factorization.

317978797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4667544, while the sum is 58.

The square root of 317978797 is about 17831.9599876177. The cubic root of 317978797 is about 682.5472491183.

The spelling of 317978797 in words is "three hundred seventeen million, nine hundred seventy-eight thousand, seven hundred ninety-seven".