1809163 has 2 divisors, whose sum is σ = 1809164. Its totient is φ = 1809162.

The previous prime is 1809149. The next prime is 1809167. The reversal of 1809163 is 3619081.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1809163 - 2¹⁷ = 1678091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1809167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904581 + 904582.

It is an arithmetic number, because the mean of its divisors is an integer number (904582).

2^1809163 is an apocalyptic number.

1809163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1809163 is an equidigital number, since it uses as much as digits as its factorization.

1809163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1809163 is about 1345.0513001369. The cubic root of 1809163 is about 121.8501025626.

The spelling of 1809163 in words is "one million, eight hundred nine thousand, one hundred sixty-three".