319969345687 has 2 divisors, whose sum is σ = 319969345688. Its totient is φ = 319969345686.

The previous prime is 319969345669. The next prime is 319969345697. The reversal of 319969345687 is 786543969913.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319969345687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319969345627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159984672843 + 159984672844.

It is an arithmetic number, because the mean of its divisors is an integer number (159984672844).

Almost surely, 2^319969345687 is an apocalyptic number.

319969345687 is a deficient number, since it is larger than the sum of its proper divisors (1).

319969345687 is an equidigital number, since it uses as much as digits as its factorization.

319969345687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264539520, while the sum is 70.

The spelling of 319969345687 in words is "three hundred nineteen billion, nine hundred sixty-nine million, three hundred forty-five thousand, six hundred eighty-seven".