19683164609 has 2 divisors, whose sum is σ = 19683164610. Its totient is φ = 19683164608.

The previous prime is 19683164591. The next prime is 19683164623. The reversal of 19683164609 is 90646138691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12918595600 + 6764569009 = 113660^2 + 82247^2 .

It is a cyclic number.

It is not a de Polignac number, because 19683164609 - 2²⁸ = 19414729153 is a prime.

It is not a weakly prime, because it can be changed into another prime (19683161609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9841582304 + 9841582305.

It is an arithmetic number, because the mean of its divisors is an integer number (9841582305).

Almost surely, 2^19683164609 is an apocalyptic number.

It is an amenable number.

19683164609 is a deficient number, since it is larger than the sum of its proper divisors (1).

19683164609 is an equidigital number, since it uses as much as digits as its factorization.

19683164609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 19683164609 in words is "nineteen billion, six hundred eighty-three million, one hundred sixty-four thousand, six hundred nine".