17345989 has 2 divisors, whose sum is σ = 17345990. Its totient is φ = 17345988.

The previous prime is 17345987. The next prime is 17346037. The reversal of 17345989 is 98954371.

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., 12723489 + 4622500 = 3567^2 + 2150^2 .

It is a cyclic number.

It is not a de Polignac number, because 17345989 - 2¹ = 17345987 is a prime.

Together with 17345987, 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 (17345983) 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, 8672994 + 8672995.

It is an arithmetic number, because the mean of its divisors is an integer number (8672995).

Almost surely, 2^17345989 is an apocalyptic number.

It is an amenable number.

17345989 is a deficient number, since it is larger than the sum of its proper divisors (1).

17345989 is an equidigital number, since it uses as much as digits as its factorization.

17345989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 17345989 is about 4164.8516180051. The cubic root of 17345989 is about 258.8608396596.

The spelling of 17345989 in words is "seventeen million, three hundred forty-five thousand, nine hundred eighty-nine".