479816221 has 2 divisors, whose sum is σ = 479816222. Its totient is φ = 479816220.

The previous prime is 479816203. The next prime is 479816237. The reversal of 479816221 is 122618974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419676196 + 60140025 = 20486^2 + 7755^2 .

It is a cyclic number.

It is not a de Polignac number, because 479816221 - 2⁷ = 479816093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479816251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239908110 + 239908111.

It is an arithmetic number, because the mean of its divisors is an integer number (239908111).

Almost surely, 2^479816221 is an apocalyptic number.

It is an amenable number.

479816221 is a deficient number, since it is larger than the sum of its proper divisors (1).

479816221 is an equidigital number, since it uses as much as digits as its factorization.

479816221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 479816221 is about 21904.7077360096. The cubic root of 479816221 is about 782.8735890252.

The spelling of 479816221 in words is "four hundred seventy-nine million, eight hundred sixteen thousand, two hundred twenty-one".