1689096817 has 2 divisors, whose sum is σ = 1689096818. Its totient is φ = 1689096816.

The previous prime is 1689096797. The next prime is 1689096833. The reversal of 1689096817 is 7186909861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 887980401 + 801116416 = 29799^2 + 28304^2 .

It is an emirp because it is prime and its reverse (7186909861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1689096817 - 2²³ = 1680708209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1689096847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844548408 + 844548409.

It is an arithmetic number, because the mean of its divisors is an integer number (844548409).

Almost surely, 2^1689096817 is an apocalyptic number.

It is an amenable number.

1689096817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689096817 is an equidigital number, since it uses as much as digits as its factorization.

1689096817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 1689096817 is about 41098.6230547935. The cubic root of 1689096817 is about 1190.9261948844.

The spelling of 1689096817 in words is "one billion, six hundred eighty-nine million, ninety-six thousand, eight hundred seventeen".