317319649 has 2 divisors, whose sum is σ = 317319650. Its totient is φ = 317319648.

The previous prime is 317319647. The next prime is 317319677. The reversal of 317319649 is 946913713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317089249 + 230400 = 17807^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 317319649 - 2¹ = 317319647 is a prime.

Together with 317319647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (317319643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158659824 + 158659825.

It is an arithmetic number, because the mean of its divisors is an integer number (158659825).

Almost surely, 2^317319649 is an apocalyptic number.

It is an amenable number.

317319649 is a deficient number, since it is larger than the sum of its proper divisors (1).

317319649 is an equidigital number, since it uses as much as digits as its factorization.

317319649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 317319649 is about 17813.4681912310. The cubic root of 317319649 is about 682.0752984860.

It can be divided in two parts, 3173 and 19649, that added together give a palindrome (22822).

The spelling of 317319649 in words is "three hundred seventeen million, three hundred nineteen thousand, six hundred forty-nine".