802811813 has 2 divisors, whose sum is σ = 802811814. Its totient is φ = 802811812.

The previous prime is 802811783. The next prime is 802811827. The reversal of 802811813 is 318118208.

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., 793943329 + 8868484 = 28177^2 + 2978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-802811813 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 802811813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (802811833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401405906 + 401405907.

It is an arithmetic number, because the mean of its divisors is an integer number (401405907).

Almost surely, 2^802811813 is an apocalyptic number.

It is an amenable number.

802811813 is a deficient number, since it is larger than the sum of its proper divisors (1).

802811813 is an equidigital number, since it uses as much as digits as its factorization.

802811813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 802811813 is about 28333.9339485360. The cubic root of 802811813 is about 929.4041016291.

The spelling of 802811813 in words is "eight hundred two million, eight hundred eleven thousand, eight hundred thirteen".