1805369 has 2 divisors, whose sum is σ = 1805370. Its totient is φ = 1805368.

The previous prime is 1805359. The next prime is 1805371. The reversal of 1805369 is 9635081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 316969 = 1220^2 + 563^2 .

It is a cyclic number.

It is not a de Polignac number, because 1805369 - 2¹² = 1801273 is a prime.

It is a super-2 number, since 2×1805369² = 6518714452322, which contains 22 as substring.

Together with 1805371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1805359) 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 as a sum of consecutive naturals, namely, 902684 + 902685.

It is an arithmetic number, because the mean of its divisors is an integer number (902685).

2^1805369 is an apocalyptic number.

It is an amenable number.

1805369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1805369 is an equidigital number, since it uses as much as digits as its factorization.

1805369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1805369 is about 1343.6402048168. The cubic root of 1805369 is about 121.7648655720.

The spelling of 1805369 in words is "one million, eight hundred five thousand, three hundred sixty-nine".