18175349 has 2 divisors, whose sum is σ = 18175350. Its totient is φ = 18175348.

The previous prime is 18175319. The next prime is 18175357. The reversal of 18175349 is 94357181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16459249 + 1716100 = 4057^2 + 1310^2 .

It is an emirp because it is prime and its reverse (94357181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18175349 - 2²⁰ = 17126773 is a prime.

It is a super-2 number, since 2×18175349² = 660686622543602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18175309) 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, 9087674 + 9087675.

It is an arithmetic number, because the mean of its divisors is an integer number (9087675).

Almost surely, 2^18175349 is an apocalyptic number.

It is an amenable number.

18175349 is a deficient number, since it is larger than the sum of its proper divisors (1).

18175349 is an equidigital number, since it uses as much as digits as its factorization.

18175349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 18175349 is about 4263.2556808148. The cubic root of 18175349 is about 262.9223989994.

The spelling of 18175349 in words is "eighteen million, one hundred seventy-five thousand, three hundred forty-nine".