799982221 has 2 divisors, whose sum is σ = 799982222. Its totient is φ = 799982220.

The previous prime is 799982219. The next prime is 799982231. The reversal of 799982221 is 122289997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612018121 + 187964100 = 24739^2 + 13710^2 .

It is an emirp because it is prime and its reverse (122289997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 799982221 - 2¹ = 799982219 is a prime.

Together with 799982219, 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 (799982231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399991110 + 399991111.

It is an arithmetic number, because the mean of its divisors is an integer number (399991111).

Almost surely, 2^799982221 is an apocalyptic number.

It is an amenable number.

799982221 is a deficient number, since it is larger than the sum of its proper divisors (1).

799982221 is an equidigital number, since it uses as much as digits as its factorization.

799982221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The square root of 799982221 is about 28283.9569544291. The cubic root of 799982221 is about 928.3108897710.

The spelling of 799982221 in words is "seven hundred ninety-nine million, nine hundred eighty-two thousand, two hundred twenty-one".