808887997 has 2 divisors, whose sum is σ = 808887998. Its totient is φ = 808887996.

The previous prime is 808887979. The next prime is 808888009. The reversal of 808887997 is 799788808.

Together with previous prime (808887979) 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., 808492356 + 395641 = 28434^2 + 629^2 .

It is a cyclic number.

It is not a de Polignac number, because 808887997 - 2⁷ = 808887869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808887917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404443998 + 404443999.

It is an arithmetic number, because the mean of its divisors is an integer number (404443999).

Almost surely, 2^808887997 is an apocalyptic number.

It is an amenable number.

808887997 is a deficient number, since it is larger than the sum of its proper divisors (1).

808887997 is an equidigital number, since it uses as much as digits as its factorization.

808887997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16257024, while the sum is 64.

The square root of 808887997 is about 28440.9563306159. The cubic root of 808887997 is about 931.7429821259.

The spelling of 808887997 in words is "eight hundred eight million, eight hundred eighty-seven thousand, nine hundred ninety-seven".