17968109 has 4 divisors (see below), whose sum is σ = 18386016. Its totient is φ = 17550204.

The previous prime is 17968103. The next prime is 17968117. The reversal of 17968109 is 90186971.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 17968109 - 2¹² = 17964013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17968103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208889 + ... + 208974.

It is an arithmetic number, because the mean of its divisors is an integer number (4596504).

Almost surely, 2^17968109 is an apocalyptic number.

It is an amenable number.

17968109 is a deficient number, since it is larger than the sum of its proper divisors (417907).

17968109 is an equidigital number, since it uses as much as digits as its factorization.

17968109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417906.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 17968109 is about 4238.8806305439. The cubic root of 17968109 is about 261.9192737330.

The spelling of 17968109 in words is "seventeen million, nine hundred sixty-eight thousand, one hundred nine".