19313039789 has 2 divisors, whose sum is σ = 19313039790. Its totient is φ = 19313039788.

The previous prime is 19313039761. The next prime is 19313039807. The reversal of 19313039789 is 98793031391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12677634025 + 6635405764 = 112595^2 + 81458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19313039789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19313039789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19313039719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9656519894 + 9656519895.

It is an arithmetic number, because the mean of its divisors is an integer number (9656519895).

Almost surely, 2^19313039789 is an apocalyptic number.

It is an amenable number.

19313039789 is a deficient number, since it is larger than the sum of its proper divisors (1).

19313039789 is an equidigital number, since it uses as much as digits as its factorization.

19313039789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 19313039789 in words is "nineteen billion, three hundred thirteen million, thirty-nine thousand, seven hundred eighty-nine".