1818413 has 2 divisors, whose sum is σ = 1818414. Its totient is φ = 1818412.

The previous prime is 1818409. The next prime is 1818419. The reversal of 1818413 is 3148181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1075369 + 743044 = 1037^2 + 862^2 .

It is a cyclic number.

It is not a de Polignac number, because 1818413 - 2² = 1818409 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1818419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909206 + 909207.

It is an arithmetic number, because the mean of its divisors is an integer number (909207).

2^1818413 is an apocalyptic number.

It is an amenable number.

1818413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818413 is an equidigital number, since it uses as much as digits as its factorization.

1818413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 26.

The square root of 1818413 is about 1348.4854467142. The cubic root of 1818413 is about 122.0574172088.

Adding to 1818413 its product of digits (768), we get a palindrome (1819181).

The spelling of 1818413 in words is "one million, eight hundred eighteen thousand, four hundred thirteen".