812896809797 has 2 divisors, whose sum is σ = 812896809798. Its totient is φ = 812896809796.

The previous prime is 812896809779. The next prime is 812896809841. The reversal of 812896809797 is 797908698218.

Together with previous prime (812896809779) 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., 486626227396 + 326270582401 = 697586^2 + 571201^2 .

It is a cyclic number.

It is not a de Polignac number, because 812896809797 - 2⁶ = 812896809733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812896809727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406448404898 + 406448404899.

It is an arithmetic number, because the mean of its divisors is an integer number (406448404899).

Almost surely, 2^812896809797 is an apocalyptic number.

It is an amenable number.

812896809797 is a deficient number, since it is larger than the sum of its proper divisors (1).

812896809797 is an equidigital number, since it uses as much as digits as its factorization.

812896809797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 219469824, while the sum is 74.

The spelling of 812896809797 in words is "eight hundred twelve billion, eight hundred ninety-six million, eight hundred nine thousand, seven hundred ninety-seven".