17430989 has 2 divisors, whose sum is σ = 17430990. Its totient is φ = 17430988.

The previous prime is 17430979. The next prime is 17431003. The reversal of 17430989 is 98903471.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10048900 + 7382089 = 3170^2 + 2717^2 .

It is an emirp because it is prime and its reverse (98903471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17430989 - 2²⁰ = 16382413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17430929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8715494 + 8715495.

It is an arithmetic number, because the mean of its divisors is an integer number (8715495).

Almost surely, 2^17430989 is an apocalyptic number.

It is an amenable number.

17430989 is a deficient number, since it is larger than the sum of its proper divisors (1).

17430989 is an equidigital number, since it uses as much as digits as its factorization.

17430989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 17430989 is about 4175.0435925868. The cubic root of 17430989 is about 259.2829800637.

The spelling of 17430989 in words is "seventeen million, four hundred thirty thousand, nine hundred eighty-nine".