794447221 has 2 divisors, whose sum is σ = 794447222. Its totient is φ = 794447220.

The previous prime is 794447189. The next prime is 794447243. The reversal of 794447221 is 122744497.

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., 492174225 + 302272996 = 22185^2 + 17386^2 .

It is a cyclic number.

It is not a de Polignac number, because 794447221 - 2⁵ = 794447189 is a prime.

It is a super-2 number, since 2×794447221² = 1262292773909245682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (794447021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397223610 + 397223611.

It is an arithmetic number, because the mean of its divisors is an integer number (397223611).

Almost surely, 2^794447221 is an apocalyptic number.

It is an amenable number.

794447221 is a deficient number, since it is larger than the sum of its proper divisors (1).

794447221 is an equidigital number, since it uses as much as digits as its factorization.

794447221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 40.

The square root of 794447221 is about 28185.9401297881. The cubic root of 794447221 is about 926.1649684242.

The spelling of 794447221 in words is "seven hundred ninety-four million, four hundred forty-seven thousand, two hundred twenty-one".