319005818693 has 2 divisors, whose sum is σ = 319005818694. Its totient is φ = 319005818692.

The previous prime is 319005818641. The next prime is 319005818741. The reversal of 319005818693 is 396818500913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266703043489 + 52302775204 = 516433^2 + 228698^2 .

It is a cyclic number.

It is not a de Polignac number, because 319005818693 - 2¹⁴ = 319005802309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319005878693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159502909346 + 159502909347.

It is an arithmetic number, because the mean of its divisors is an integer number (159502909347).

Almost surely, 2^319005818693 is an apocalyptic number.

It is an amenable number.

319005818693 is a deficient number, since it is larger than the sum of its proper divisors (1).

319005818693 is an equidigital number, since it uses as much as digits as its factorization.

319005818693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 319005818693 in words is "three hundred nineteen billion, five million, eight hundred eighteen thousand, six hundred ninety-three".