797917 has 2 divisors, whose sum is σ = 797918. Its totient is φ = 797916.

The previous prime is 797911. The next prime is 797933. The reversal of 797917 is 719797.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 749956 + 47961 = 866^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 797917 - 2¹⁹ = 273629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 797917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398958 + 398959.

It is an arithmetic number, because the mean of its divisors is an integer number (398959).

2⁷⁹⁷⁹¹⁷ is an apocalyptic number.

It is an amenable number.

797917 is a deficient number, since it is larger than the sum of its proper divisors (1).

797917 is an equidigital number, since it uses as much as digits as its factorization.

797917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27783, while the sum is 40.

The square root of 797917 is about 893.2619996395. The cubic root of 797917 is about 92.7511363965.

The spelling of 797917 in words is "seven hundred ninety-seven thousand, nine hundred seventeen".