494342221 has 2 divisors, whose sum is σ = 494342222. Its totient is φ = 494342220.

The previous prime is 494342161. The next prime is 494342339. The reversal of 494342221 is 122243494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 458174025 + 36168196 = 21405^2 + 6014^2 .

It is a cyclic number.

It is not a de Polignac number, because 494342221 - 2⁹ = 494341709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494342021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247171110 + 247171111.

It is an arithmetic number, because the mean of its divisors is an integer number (247171111).

Almost surely, 2^494342221 is an apocalyptic number.

It is an amenable number.

494342221 is a deficient number, since it is larger than the sum of its proper divisors (1).

494342221 is an equidigital number, since it uses as much as digits as its factorization.

494342221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 494342221 is about 22233.8080633975. The cubic root of 494342221 is about 790.6954411369.

The spelling of 494342221 in words is "four hundred ninety-four million, three hundred forty-two thousand, two hundred twenty-one".