1806802813 has 2 divisors, whose sum is σ = 1806802814. Its totient is φ = 1806802812.

The previous prime is 1806802771. The next prime is 1806802819. The reversal of 1806802813 is 3182086081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1277204644 + 529598169 = 35738^2 + 23013^2 .

It is an emirp because it is prime and its reverse (3182086081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1806802813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1806802819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 903401406 + 903401407.

It is an arithmetic number, because the mean of its divisors is an integer number (903401407).

Almost surely, 2^1806802813 is an apocalyptic number.

It is an amenable number.

1806802813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1806802813 is an equidigital number, since it uses as much as digits as its factorization.

1806802813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 1806802813 is about 42506.5031848069. The cubic root of 1806802813 is about 1217.9709201222.

Adding to 1806802813 its reverse (3182086081), we get a palindrome (4988888894).

The spelling of 1806802813 in words is "one billion, eight hundred six million, eight hundred two thousand, eight hundred thirteen".