827555797 has 2 divisors, whose sum is σ = 827555798. Its totient is φ = 827555796.

The previous prime is 827555779. The next prime is 827555809. The reversal of 827555797 is 797555728.

Together with previous prime (827555779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 775845316 + 51710481 = 27854^2 + 7191^2 .

It is a cyclic number.

It is not a de Polignac number, because 827555797 - 2⁷ = 827555669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (827555717) 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, 413777898 + 413777899.

It is an arithmetic number, because the mean of its divisors is an integer number (413777899).

Almost surely, 2^827555797 is an apocalyptic number.

It is an amenable number.

827555797 is a deficient number, since it is larger than the sum of its proper divisors (1).

827555797 is an equidigital number, since it uses as much as digits as its factorization.

827555797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6174000, while the sum is 55.

The square root of 827555797 is about 28767.2695437019. The cubic root of 827555797 is about 938.8562356198.

The spelling of 827555797 in words is "eight hundred twenty-seven million, five hundred fifty-five thousand, seven hundred ninety-seven".