18790169 has 2 divisors, whose sum is σ = 18790170. Its totient is φ = 18790168.

The previous prime is 18790157. The next prime is 18790193. The reversal of 18790169 is 96109781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18386944 + 403225 = 4288^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 18790169 - 2²⁰ = 17741593 is a prime.

It is a super-2 number, since 2×18790169² = 706140902097122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18790129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9395084 + 9395085.

It is an arithmetic number, because the mean of its divisors is an integer number (9395085).

Almost surely, 2^18790169 is an apocalyptic number.

It is an amenable number.

18790169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18790169 is an equidigital number, since it uses as much as digits as its factorization.

18790169 is an evil number, because the sum of its binary digits is even.

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

The square root of 18790169 is about 4334.7628539518. The cubic root of 18790169 is about 265.8542222317.

The spelling of 18790169 in words is "eighteen million, seven hundred ninety thousand, one hundred sixty-nine".