17108989 has 2 divisors, whose sum is σ = 17108990. Its totient is φ = 17108988.

The previous prime is 17108981. The next prime is 17109031. The reversal of 17108989 is 98980171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10692900 + 6416089 = 3270^2 + 2533^2 .

It is a cyclic number.

It is not a de Polignac number, because 17108989 - 2³ = 17108981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17108981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8554494 + 8554495.

It is an arithmetic number, because the mean of its divisors is an integer number (8554495).

Almost surely, 2^17108989 is an apocalyptic number.

It is an amenable number.

17108989 is a deficient number, since it is larger than the sum of its proper divisors (1).

17108989 is an equidigital number, since it uses as much as digits as its factorization.

17108989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 17108989 is about 4136.3013671637. The cubic root of 17108989 is about 257.6764819019.

It can be divided in two parts, 171089 and 89, that multiplied together give a triangular number (15226921 = T₅₅₁₈).

The spelling of 17108989 in words is "seventeen million, one hundred eight thousand, nine hundred eighty-nine".