447868409 has 2 divisors, whose sum is σ = 447868410. Its totient is φ = 447868408.

The previous prime is 447868403. The next prime is 447868427. The reversal of 447868409 is 904868744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363283600 + 84584809 = 19060^2 + 9197^2 .

It is a cyclic number.

It is not a de Polignac number, because 447868409 - 2⁸ = 447868153 is a prime.

It is a super-2 number, since 2×447868409² = 401172223560382562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (447868403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223934204 + 223934205.

It is an arithmetic number, because the mean of its divisors is an integer number (223934205).

Almost surely, 2^447868409 is an apocalyptic number.

It is an amenable number.

447868409 is a deficient number, since it is larger than the sum of its proper divisors (1).

447868409 is an equidigital number, since it uses as much as digits as its factorization.

447868409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 50.

The square root of 447868409 is about 21162.9017150295. The cubic root of 447868409 is about 765.0975477585.

The spelling of 447868409 in words is "four hundred forty-seven million, eight hundred sixty-eight thousand, four hundred nine".