19683879689 has 2 divisors, whose sum is σ = 19683879690. Its totient is φ = 19683879688.

The previous prime is 19683879679. The next prime is 19683879701. The reversal of 19683879689 is 98697838691.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11792222464 + 7891657225 = 108592^2 + 88835^2 .

It is a cyclic number.

It is not a de Polignac number, because 19683879689 - 2¹⁶ = 19683814153 is a prime.

It is a super-2 number, since 2×19683879689² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19683879679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9841939844 + 9841939845.

It is an arithmetic number, because the mean of its divisors is an integer number (9841939845).

Almost surely, 2^19683879689 is an apocalyptic number.

It is an amenable number.

19683879689 is a deficient number, since it is larger than the sum of its proper divisors (1).

19683879689 is an equidigital number, since it uses as much as digits as its factorization.

19683879689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282175488, while the sum is 74.

The spelling of 19683879689 in words is "nineteen billion, six hundred eighty-three million, eight hundred seventy-nine thousand, six hundred eighty-nine".