1813313 has 2 divisors, whose sum is σ = 1813314. Its totient is φ = 1813312.

The previous prime is 1813291. The next prime is 1813319. The reversal of 1813313 is 3133181.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1763584 + 49729 = 1328^2 + 223^2 .

It is an emirp because it is prime and its reverse (3133181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1813313 - 2¹² = 1809217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1813319) 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, 906656 + 906657.

It is an arithmetic number, because the mean of its divisors is an integer number (906657).

2^1813313 is an apocalyptic number.

It is an amenable number.

1813313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813313 is an equidigital number, since it uses as much as digits as its factorization.

1813313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 1813313 is about 1346.5931085521. The cubic root of 1813313 is about 121.9432011876.

Adding to 1813313 its reverse (3133181), we get a palindrome (4946494).

It can be divided in two parts, 18 and 13313, that added together give a palindrome (13331).

The spelling of 1813313 in words is "one million, eight hundred thirteen thousand, three hundred thirteen".