317647879 has 2 divisors, whose sum is σ = 317647880. Its totient is φ = 317647878.

The previous prime is 317647877. The next prime is 317647999. The reversal of 317647879 is 978746713.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 317647879 - 2¹ = 317647877 is a prime.

Together with 317647877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317647877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158823939 + 158823940.

It is an arithmetic number, because the mean of its divisors is an integer number (158823940).

Almost surely, 2^317647879 is an apocalyptic number.

317647879 is a deficient number, since it is larger than the sum of its proper divisors (1).

317647879 is an equidigital number, since it uses as much as digits as its factorization.

317647879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 52.

The square root of 317647879 is about 17822.6787829439. The cubic root of 317647879 is about 682.3103931070.

The spelling of 317647879 in words is "three hundred seventeen million, six hundred forty-seven thousand, eight hundred seventy-nine".