4047409 has 2 divisors, whose sum is σ = 4047410. Its totient is φ = 4047408.

The previous prime is 4047383. The next prime is 4047413. The reversal of 4047409 is 9047404.

4047409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3186225 + 861184 = 1785^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 4047409 - 2⁹ = 4046897 is a prime.

It is a super-2 number, since 2×4047409² = 32763039226562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4047419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2023704 + 2023705.

It is an arithmetic number, because the mean of its divisors is an integer number (2023705).

Almost surely, 2^4047409 is an apocalyptic number.

It is an amenable number.

4047409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4047409 is an equidigital number, since it uses as much as digits as its factorization.

4047409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 4047409 is about 2011.8173376328. The cubic root of 4047409 is about 159.3647861710.

The spelling of 4047409 in words is "four million, forty-seven thousand, four hundred nine".