319993717 has 2 divisors, whose sum is σ = 319993718. Its totient is φ = 319993716.

The previous prime is 319993711. The next prime is 319993753. The reversal of 319993717 is 717399913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316341796 + 3651921 = 17786^2 + 1911^2 .

It is an emirp because it is prime and its reverse (717399913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 319993717 - 2¹⁹ = 319469429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319993711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159996858 + 159996859.

It is an arithmetic number, because the mean of its divisors is an integer number (159996859).

Almost surely, 2^319993717 is an apocalyptic number.

It is an amenable number.

319993717 is a deficient number, since it is larger than the sum of its proper divisors (1).

319993717 is an equidigital number, since it uses as much as digits as its factorization.

319993717 is an evil number, because the sum of its binary digits is even.

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

The square root of 319993717 is about 17888.3682039475. The cubic root of 319993717 is about 683.9859020668.

The spelling of 319993717 in words is "three hundred nineteen million, nine hundred ninety-three thousand, seven hundred seventeen".