808221797 has 2 divisors, whose sum is σ = 808221798. Its totient is φ = 808221796.

The previous prime is 808221767. The next prime is 808221833. The reversal of 808221797 is 797122808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 733813921 + 74407876 = 27089^2 + 8626^2 .

It is a cyclic number.

It is not a de Polignac number, because 808221797 - 2¹² = 808217701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808221767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404110898 + 404110899.

It is an arithmetic number, because the mean of its divisors is an integer number (404110899).

Almost surely, 2^808221797 is an apocalyptic number.

It is an amenable number.

808221797 is a deficient number, since it is larger than the sum of its proper divisors (1).

808221797 is an equidigital number, since it uses as much as digits as its factorization.

808221797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 808221797 is about 28429.2419350218. The cubic root of 808221797 is about 931.4871174222.

The spelling of 808221797 in words is "eight hundred eight million, two hundred twenty-one thousand, seven hundred ninety-seven".