319997317 has 4 divisors (see below), whose sum is σ = 322145100. Its totient is φ = 317849536.

The previous prime is 319997311. The next prime is 319997323. The reversal of 319997317 is 713799913.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 713799913 = 73 ⋅9778081.

It is an interprime number because it is at equal distance from previous prime (319997311) and next prime (319997323).

It can be written as a sum of positive squares in 2 ways, for example, as 165019716 + 154977601 = 12846^2 + 12449^2 .

It is a cyclic number.

It is not a de Polignac number, because 319997317 - 2¹⁵ = 319964549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319997311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073668 + ... + 1073965.

It is an arithmetic number, because the mean of its divisors is an integer number (80536275).

Almost surely, 2^319997317 is an apocalyptic number.

It is an amenable number.

319997317 is a deficient number, since it is larger than the sum of its proper divisors (2147783).

319997317 is a wasteful number, since it uses less digits than its factorization.

319997317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147782.

The product of its digits is 321489, while the sum is 49.

The square root of 319997317 is about 17888.4688277113. The cubic root of 319997317 is about 683.9884670547.

The spelling of 319997317 in words is "three hundred nineteen million, nine hundred ninety-seven thousand, three hundred seventeen".