319608389 has 2 divisors, whose sum is σ = 319608390. Its totient is φ = 319608388.

The previous prime is 319608361. The next prime is 319608397. The reversal of 319608389 is 983806913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264225025 + 55383364 = 16255^2 + 7442^2 .

It is an emirp because it is prime and its reverse (983806913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 319608389 - 2²⁴ = 302831173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319608689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159804194 + 159804195.

It is an arithmetic number, because the mean of its divisors is an integer number (159804195).

Almost surely, 2^319608389 is an apocalyptic number.

It is an amenable number.

319608389 is a deficient number, since it is larger than the sum of its proper divisors (1).

319608389 is an equidigital number, since it uses as much as digits as its factorization.

319608389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 319608389 is about 17877.5946088952. The cubic root of 319608389 is about 683.7112458609.

The spelling of 319608389 in words is "three hundred nineteen million, six hundred eight thousand, three hundred eighty-nine".