319657697 has 2 divisors, whose sum is σ = 319657698. Its totient is φ = 319657696.

The previous prime is 319657673. The next prime is 319657699. The reversal of 319657697 is 796756913.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309443281 + 10214416 = 17591^2 + 3196^2 .

It is an emirp because it is prime and its reverse (796756913) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319657697 is a prime.

Together with 319657699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (319657699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159828848 + 159828849.

It is an arithmetic number, because the mean of its divisors is an integer number (159828849).

Almost surely, 2^319657697 is an apocalyptic number.

It is an amenable number.

319657697 is a deficient number, since it is larger than the sum of its proper divisors (1).

319657697 is an equidigital number, since it uses as much as digits as its factorization.

319657697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2143260, while the sum is 53.

The square root of 319657697 is about 17878.9736002937. The cubic root of 319657697 is about 683.7464042002.

The spelling of 319657697 in words is "three hundred nineteen million, six hundred fifty-seven thousand, six hundred ninety-seven".