798221 has 2 divisors, whose sum is σ = 798222. Its totient is φ = 798220.

The previous prime is 798199. The next prime is 798223. The reversal of 798221 is 122897.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 784996 + 13225 = 886^2 + 115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-798221 is a prime.

Together with 798223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (798223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399110 + 399111.

It is an arithmetic number, because the mean of its divisors is an integer number (399111).

2⁷⁹⁸²²¹ is an apocalyptic number.

It is an amenable number.

798221 is a deficient number, since it is larger than the sum of its proper divisors (1).

798221 is an equidigital number, since it uses as much as digits as its factorization.

798221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 798221 is about 893.4321462764. The cubic root of 798221 is about 92.7629140481.

The spelling of 798221 in words is "seven hundred ninety-eight thousand, two hundred twenty-one".