319820797 has 2 divisors, whose sum is σ = 319820798. Its totient is φ = 319820796.

The previous prime is 319820783. The next prime is 319820807. The reversal of 319820797 is 797028913.

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., 233906436 + 85914361 = 15294^2 + 9269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319820797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319820717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159910398 + 159910399.

It is an arithmetic number, because the mean of its divisors is an integer number (159910399).

Almost surely, 2^319820797 is an apocalyptic number.

It is an amenable number.

319820797 is a deficient number, since it is larger than the sum of its proper divisors (1).

319820797 is an equidigital number, since it uses as much as digits as its factorization.

319820797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 319820797 is about 17883.5342424253. The cubic root of 319820797 is about 683.8626744877.

The spelling of 319820797 in words is "three hundred nineteen million, eight hundred twenty thousand, seven hundred ninety-seven".