17797427689 has 2 divisors, whose sum is σ = 17797427690. Its totient is φ = 17797427688.

The previous prime is 17797427621. The next prime is 17797427693. The reversal of 17797427689 is 98672479771.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16604899600 + 1192528089 = 128860^2 + 34533^2 .

It is a cyclic number.

It is not a de Polignac number, because 17797427689 - 2⁷ = 17797427561 is a prime.

It is not a weakly prime, because it can be changed into another prime (17794427689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8898713844 + 8898713845.

It is an arithmetic number, because the mean of its divisors is an integer number (8898713845).

Almost surely, 2^17797427689 is an apocalyptic number.

It is an amenable number.

17797427689 is a deficient number, since it is larger than the sum of its proper divisors (1).

17797427689 is an equidigital number, since it uses as much as digits as its factorization.

17797427689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74680704, while the sum is 67.

The spelling of 17797427689 in words is "seventeen billion, seven hundred ninety-seven million, four hundred twenty-seven thousand, six hundred eighty-nine".