1800103 has 2 divisors, whose sum is σ = 1800104. Its totient is φ = 1800102.

The previous prime is 1800091. The next prime is 1800119. The reversal of 1800103 is 3010081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1800103 - 2⁹ = 1799591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1800803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900051 + 900052.

It is an arithmetic number, because the mean of its divisors is an integer number (900052).

2^1800103 is an apocalyptic number.

1800103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1800103 is an equidigital number, since it uses as much as digits as its factorization.

1800103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1800103 is about 1341.6791717844. The cubic root of 1800103 is about 121.6463601146.

Adding to 1800103 its reverse (3010081), we get a palindrome (4810184).

The spelling of 1800103 in words is "one million, eight hundred thousand, one hundred three".