1822003 has 2 divisors, whose sum is σ = 1822004. Its totient is φ = 1822002.

The previous prime is 1821997. The next prime is 1822013. The reversal of 1822003 is 3002281.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3002281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1822003 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1822013) 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, 911001 + 911002.

It is an arithmetic number, because the mean of its divisors is an integer number (911002).

2^1822003 is an apocalyptic number.

1822003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1822003 is an equidigital number, since it uses as much as digits as its factorization.

1822003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1822003 is about 1349.8159133749. The cubic root of 1822003 is about 122.1376883171.

Adding to 1822003 its reverse (3002281), we get a palindrome (4824284).

The spelling of 1822003 in words is "one million, eight hundred twenty-two thousand, three".