319798813 has 2 divisors, whose sum is σ = 319798814. Its totient is φ = 319798812.

The previous prime is 319798727. The next prime is 319798819. The reversal of 319798813 is 318897913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203547289 + 116251524 = 14267^2 + 10782^2 .

It is a cyclic number.

It is not a de Polignac number, because 319798813 - 2⁹ = 319798301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319798819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159899406 + 159899407.

It is an arithmetic number, because the mean of its divisors is an integer number (159899407).

Almost surely, 2^319798813 is an apocalyptic number.

It is an amenable number.

319798813 is a deficient number, since it is larger than the sum of its proper divisors (1).

319798813 is an equidigital number, since it uses as much as digits as its factorization.

319798813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The square root of 319798813 is about 17882.9195882552. The cubic root of 319798813 is about 683.8470048985.

The spelling of 319798813 in words is "three hundred nineteen million, seven hundred ninety-eight thousand, eight hundred thirteen".