17994589 has 2 divisors, whose sum is σ = 17994590. Its totient is φ = 17994588.

The previous prime is 17994547. The next prime is 17994607. The reversal of 17994589 is 98549971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17994564 + 25 = 4242^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 17994589 - 2⁷ = 17994461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17994289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8997294 + 8997295.

It is an arithmetic number, because the mean of its divisors is an integer number (8997295).

Almost surely, 2^17994589 is an apocalyptic number.

It is an amenable number.

17994589 is a deficient number, since it is larger than the sum of its proper divisors (1).

17994589 is an equidigital number, since it uses as much as digits as its factorization.

17994589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 52.

The square root of 17994589 is about 4242.0029467222. The cubic root of 17994589 is about 262.0478759896.

The spelling of 17994589 in words is "seventeen million, nine hundred ninety-four thousand, five hundred eighty-nine".