800656613 has 2 divisors, whose sum is σ = 800656614. Its totient is φ = 800656612.

The previous prime is 800656601. The next prime is 800656631. The reversal of 800656613 is 316656008.

Together with next prime (800656631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 795352804 + 5303809 = 28202^2 + 2303^2 .

It is a cyclic number.

It is not a de Polignac number, because 800656613 - 2¹⁴ = 800640229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800656693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400328306 + 400328307.

It is an arithmetic number, because the mean of its divisors is an integer number (400328307).

Almost surely, 2^800656613 is an apocalyptic number.

It is an amenable number.

800656613 is a deficient number, since it is larger than the sum of its proper divisors (1).

800656613 is an equidigital number, since it uses as much as digits as its factorization.

800656613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 800656613 is about 28295.8762543237. The cubic root of 800656613 is about 928.5716745663.

The spelling of 800656613 in words is "eight hundred million, six hundred fifty-six thousand, six hundred thirteen".