1818373 has 2 divisors, whose sum is σ = 1818374. Its totient is φ = 1818372.

The previous prime is 1818353. The next prime is 1818379. The reversal of 1818373 is 3738181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1181569 + 636804 = 1087^2 + 798^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1818373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1818379) 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, 909186 + 909187.

It is an arithmetic number, because the mean of its divisors is an integer number (909187).

2^1818373 is an apocalyptic number.

It is an amenable number.

1818373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818373 is an equidigital number, since it uses as much as digits as its factorization.

1818373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 1818373 is about 1348.4706151785. The cubic root of 1818373 is about 122.0565222283.

The spelling of 1818373 in words is "one million, eight hundred eighteen thousand, three hundred seventy-three".