17664089 has 2 divisors, whose sum is σ = 17664090. Its totient is φ = 17664088.

The previous prime is 17664067. The next prime is 17664107. The reversal of 17664089 is 98046671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16540489 + 1123600 = 4067^2 + 1060^2 .

It is an emirp because it is prime and its reverse (98046671) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17664089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (17664289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8832044 + 8832045.

It is an arithmetic number, because the mean of its divisors is an integer number (8832045).

Almost surely, 2^17664089 is an apocalyptic number.

It is an amenable number.

17664089 is a deficient number, since it is larger than the sum of its proper divisors (1).

17664089 is an equidigital number, since it uses as much as digits as its factorization.

17664089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 17664089 is about 4202.8667597248. The cubic root of 17664089 is about 260.4336402576.

The spelling of 17664089 in words is "seventeen million, six hundred sixty-four thousand, eighty-nine".