317880427 has 2 divisors, whose sum is σ = 317880428. Its totient is φ = 317880426.

The previous prime is 317880391. The next prime is 317880449. The reversal of 317880427 is 724088713.

It is a strong prime.

It is an emirp because it is prime and its reverse (724088713) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317880427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 317880427.

It is not a weakly prime, because it can be changed into another prime (317880487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158940213 + 158940214.

It is an arithmetic number, because the mean of its divisors is an integer number (158940214).

Almost surely, 2^317880427 is an apocalyptic number.

317880427 is a deficient number, since it is larger than the sum of its proper divisors (1).

317880427 is an equidigital number, since it uses as much as digits as its factorization.

317880427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 317880427 is about 17829.2015244654. The cubic root of 317880427 is about 682.4768575299.

The spelling of 317880427 in words is "three hundred seventeen million, eight hundred eighty thousand, four hundred twenty-seven".