319997311 has 2 divisors, whose sum is σ = 319997312. Its totient is φ = 319997310.

The previous prime is 319997299. The next prime is 319997323. The reversal of 319997311 is 113799913.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (319997299) and next prime (319997323).

It is an emirp because it is prime and its reverse (113799913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 319997311 - 2²¹ = 317900159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319997351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159998655 + 159998656.

It is an arithmetic number, because the mean of its divisors is an integer number (159998656).

Almost surely, 2^319997311 is an apocalyptic number.

319997311 is a deficient number, since it is larger than the sum of its proper divisors (1).

319997311 is an equidigital number, since it uses as much as digits as its factorization.

319997311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45927, while the sum is 43.

The square root of 319997311 is about 17888.4686600055. The cubic root of 319997311 is about 683.9884627798.

The spelling of 319997311 in words is "three hundred nineteen million, nine hundred ninety-seven thousand, three hundred eleven".