17090989 has 2 divisors, whose sum is σ = 17090990. Its totient is φ = 17090988.

The previous prime is 17090987. The next prime is 17090993. The reversal of 17090989 is 98909071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15444900 + 1646089 = 3930^2 + 1283^2 .

It is an emirp because it is prime and its reverse (98909071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17090989 - 2¹ = 17090987 is a prime.

Together with 17090987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17090981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8545494 + 8545495.

It is an arithmetic number, because the mean of its divisors is an integer number (8545495).

Almost surely, 2^17090989 is an apocalyptic number.

It is an amenable number.

17090989 is a deficient number, since it is larger than the sum of its proper divisors (1).

17090989 is an equidigital number, since it uses as much as digits as its factorization.

17090989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 17090989 is about 4134.1249376380. The cubic root of 17090989 is about 257.5860848948.

The spelling of 17090989 in words is "seventeen million, ninety thousand, nine hundred eighty-nine".