812586013 has 2 divisors, whose sum is σ = 812586014. Its totient is φ = 812586012.

The previous prime is 812586001. The next prime is 812586031. The reversal of 812586013 is 310685218.

Together with next prime (812586031) 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., 776068164 + 36517849 = 27858^2 + 6043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812586013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812586013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812586413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406293006 + 406293007.

It is an arithmetic number, because the mean of its divisors is an integer number (406293007).

Almost surely, 2^812586013 is an apocalyptic number.

It is an amenable number.

812586013 is a deficient number, since it is larger than the sum of its proper divisors (1).

812586013 is an equidigital number, since it uses as much as digits as its factorization.

812586013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 812586013 is about 28505.8943553785. The cubic root of 812586013 is about 933.1607156816.

The spelling of 812586013 in words is "eight hundred twelve million, five hundred eighty-six thousand, thirteen".