319890137519 has 2 divisors, whose sum is σ = 319890137520. Its totient is φ = 319890137518.

The previous prime is 319890137509. The next prime is 319890137531. The reversal of 319890137519 is 915731098913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 319890137519 - 2⁸ = 319890137263 is a prime.

It is a super-2 number, since 2×319890137519² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319890137509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159945068759 + 159945068760.

It is an arithmetic number, because the mean of its divisors is an integer number (159945068760).

Almost surely, 2^319890137519 is an apocalyptic number.

319890137519 is a deficient number, since it is larger than the sum of its proper divisors (1).

319890137519 is an equidigital number, since it uses as much as digits as its factorization.

319890137519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1837080, while the sum is 56.

The spelling of 319890137519 in words is "three hundred nineteen billion, eight hundred ninety million, one hundred thirty-seven thousand, five hundred nineteen".