411809 has 2 divisors, whose sum is σ = 411810. Its totient is φ = 411808.

The previous prime is 411799. The next prime is 411821. The reversal of 411809 is 908114.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409600 + 2209 = 640^2 + 47^2 .

It is a cyclic number.

It is not a de Polignac number, because 411809 - 2¹² = 407713 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (411409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205904 + 205905.

It is an arithmetic number, because the mean of its divisors is an integer number (205905).

2⁴¹¹⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

411809 is a deficient number, since it is larger than the sum of its proper divisors (1).

411809 is an equidigital number, since it uses as much as digits as its factorization.

411809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 411809 is about 641.7234606900. The cubic root of 411809 is about 74.3986881682.

The spelling of 411809 in words is "four hundred eleven thousand, eight hundred nine".