827981797 has 2 divisors, whose sum is σ = 827981798. Its totient is φ = 827981796.

The previous prime is 827981747. The next prime is 827981827. The reversal of 827981797 is 797189728.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 817445281 + 10536516 = 28591^2 + 3246^2 .

It is a cyclic number.

It is not a de Polignac number, because 827981797 - 2¹⁹ = 827457509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (827981747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413990898 + 413990899.

It is an arithmetic number, because the mean of its divisors is an integer number (413990899).

Almost surely, 2^827981797 is an apocalyptic number.

It is an amenable number.

827981797 is a deficient number, since it is larger than the sum of its proper divisors (1).

827981797 is an equidigital number, since it uses as much as digits as its factorization.

827981797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 58.

The square root of 827981797 is about 28774.6728391480. The cubic root of 827981797 is about 939.0173059869.

The spelling of 827981797 in words is "eight hundred twenty-seven million, nine hundred eighty-one thousand, seven hundred ninety-seven".