17996109 has 4 divisors (see below), whose sum is σ = 23994816. Its totient is φ = 11997404.

The previous prime is 17996101. The next prime is 17996117. The reversal of 17996109 is 90169971.

17996109 is nontrivially palindromic in base 11.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90169971 = 3 ⋅30056657.

It is an interprime number because it is at equal distance from previous prime (17996101) and next prime (17996117).

It is a cyclic number.

It is not a de Polignac number, because 17996109 - 2³ = 17996101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17996101) 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 in 3 ways as a sum of consecutive naturals, for example, 2999349 + ... + 2999354.

It is an arithmetic number, because the mean of its divisors is an integer number (5998704).

Almost surely, 2^17996109 is an apocalyptic number.

It is an amenable number.

17996109 is a deficient number, since it is larger than the sum of its proper divisors (5998707).

17996109 is an equidigital number, since it uses as much as digits as its factorization.

17996109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5998706.

The product of its (nonzero) digits is 30618, while the sum is 42.

The square root of 17996109 is about 4242.1821035877. The cubic root of 17996109 is about 262.0552541623.

The spelling of 17996109 in words is "seventeen million, nine hundred ninety-six thousand, one hundred nine".