17281994489 has 2 divisors, whose sum is σ = 17281994490. Its totient is φ = 17281994488.

The previous prime is 17281994473. The next prime is 17281994497. The reversal of 17281994489 is 98449918271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17271216400 + 10778089 = 131420^2 + 3283^2 .

It is a cyclic number.

It is not a de Polignac number, because 17281994489 - 2⁴ = 17281994473 is a prime.

It is a super-2 number, since 2×17281994489² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (17281994189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8640997244 + 8640997245.

It is an arithmetic number, because the mean of its divisors is an integer number (8640997245).

Almost surely, 2^17281994489 is an apocalyptic number.

It is an amenable number.

17281994489 is a deficient number, since it is larger than the sum of its proper divisors (1).

17281994489 is an equidigital number, since it uses as much as digits as its factorization.

17281994489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 62.

The spelling of 17281994489 in words is "seventeen billion, two hundred eighty-one million, nine hundred ninety-four thousand, four hundred eighty-nine".