18069169 has 2 divisors, whose sum is σ = 18069170. Its totient is φ = 18069168.

The previous prime is 18069167. The next prime is 18069199. The reversal of 18069169 is 96196081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9734400 + 8334769 = 3120^2 + 2887^2 .

It is a cyclic number.

It is not a de Polignac number, because 18069169 - 2¹ = 18069167 is a prime.

It is a super-2 number, since 2×18069169² = 652989736701122, which contains 22 as substring.

Together with 18069167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18069167) 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 as a sum of consecutive naturals, namely, 9034584 + 9034585.

It is an arithmetic number, because the mean of its divisors is an integer number (9034585).

Almost surely, 2^18069169 is an apocalyptic number.

It is an amenable number.

18069169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18069169 is an equidigital number, since it uses as much as digits as its factorization.

18069169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 18069169 is about 4250.7845158276. The cubic root of 18069169 is about 262.4094030517.

The spelling of 18069169 in words is "eighteen million, sixty-nine thousand, one hundred sixty-nine".