317828639 has 2 divisors, whose sum is σ = 317828640. Its totient is φ = 317828638.

The previous prime is 317828593. The next prime is 317828657. The reversal of 317828639 is 936828713.

It is a strong prime.

It is an emirp because it is prime and its reverse (936828713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317828639 - 2⁸ = 317828383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 317828593 and 317828602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317828839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158914319 + 158914320.

It is an arithmetic number, because the mean of its divisors is an integer number (158914320).

Almost surely, 2^317828639 is an apocalyptic number.

317828639 is a deficient number, since it is larger than the sum of its proper divisors (1).

317828639 is an equidigital number, since it uses as much as digits as its factorization.

317828639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 317828639 is about 17827.7491288160. The cubic root of 317828639 is about 682.4397932462.

The spelling of 317828639 in words is "three hundred seventeen million, eight hundred twenty-eight thousand, six hundred thirty-nine".