319719695489 has 2 divisors, whose sum is σ = 319719695490. Its totient is φ = 319719695488.

The previous prime is 319719695443. The next prime is 319719695507. The reversal of 319719695489 is 984596917913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225332494864 + 94387200625 = 474692^2 + 307225^2 .

It is a cyclic number.

It is not a de Polignac number, because 319719695489 - 2¹⁶ = 319719629953 is a prime.

It is not a weakly prime, because it can be changed into another prime (319719695089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159859847744 + 159859847745.

It is an arithmetic number, because the mean of its divisors is an integer number (159859847745).

Almost surely, 2^319719695489 is an apocalyptic number.

It is an amenable number.

319719695489 is a deficient number, since it is larger than the sum of its proper divisors (1).

319719695489 is an equidigital number, since it uses as much as digits as its factorization.

319719695489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132269760, while the sum is 71.

The spelling of 319719695489 in words is "three hundred nineteen billion, seven hundred nineteen million, six hundred ninety-five thousand, four hundred eighty-nine".