804720013 has 2 divisors, whose sum is σ = 804720014. Its totient is φ = 804720012.

The previous prime is 804719999. The next prime is 804720047. The reversal of 804720013 is 310027408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 804403044 + 316969 = 28362^2 + 563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-804720013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 804720013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801720013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402360006 + 402360007.

It is an arithmetic number, because the mean of its divisors is an integer number (402360007).

Almost surely, 2^804720013 is an apocalyptic number.

It is an amenable number.

804720013 is a deficient number, since it is larger than the sum of its proper divisors (1).

804720013 is an equidigital number, since it uses as much as digits as its factorization.

804720013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 804720013 is about 28367.5873665703. The cubic root of 804720013 is about 930.1398845352.

The spelling of 804720013 in words is "eight hundred four million, seven hundred twenty thousand, thirteen".