319399697 has 2 divisors, whose sum is σ = 319399698. Its totient is φ = 319399696.

The previous prime is 319399631. The next prime is 319399711. The reversal of 319399697 is 796993913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253319056 + 66080641 = 15916^2 + 8129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319399697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (319399397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159699848 + 159699849.

It is an arithmetic number, because the mean of its divisors is an integer number (159699849).

Almost surely, 2^319399697 is an apocalyptic number.

It is an amenable number.

319399697 is a deficient number, since it is larger than the sum of its proper divisors (1).

319399697 is an equidigital number, since it uses as much as digits as its factorization.

319399697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2480058, while the sum is 56.

The square root of 319399697 is about 17871.7569645516. The cubic root of 319399697 is about 683.5624010668.

The spelling of 319399697 in words is "three hundred nineteen million, three hundred ninety-nine thousand, six hundred ninety-seven".