409291 has 2 divisors, whose sum is σ = 409292. Its totient is φ = 409290.

The previous prime is 409289. The next prime is 409327. The reversal of 409291 is 192904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 409291 - 2¹ = 409289 is a prime.

Together with 409289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (409261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204645 + 204646.

It is an arithmetic number, because the mean of its divisors is an integer number (204646).

2⁴⁰⁹²⁹¹ is an apocalyptic number.

409291 is a deficient number, since it is larger than the sum of its proper divisors (1).

409291 is an equidigital number, since it uses as much as digits as its factorization.

409291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 409291 is about 639.7585482039. The cubic root of 409291 is about 74.2467414971.

The spelling of 409291 in words is "four hundred nine thousand, two hundred ninety-one".