382439221 has 2 divisors, whose sum is σ = 382439222. Its totient is φ = 382439220.

The previous prime is 382439209. The next prime is 382439249. The reversal of 382439221 is 122934283.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240591121 + 141848100 = 15511^2 + 11910^2 .

It is an emirp because it is prime and its reverse (122934283) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 382439221 - 2⁹ = 382438709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (382439251) 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, 191219610 + 191219611.

It is an arithmetic number, because the mean of its divisors is an integer number (191219611).

Almost surely, 2^382439221 is an apocalyptic number.

It is an amenable number.

382439221 is a deficient number, since it is larger than the sum of its proper divisors (1).

382439221 is an equidigital number, since it uses as much as digits as its factorization.

382439221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 382439221 is about 19556.0533083749. The cubic root of 382439221 is about 725.8621347495.

The spelling of 382439221 in words is "three hundred eighty-two million, four hundred thirty-nine thousand, two hundred twenty-one".