408091 has 2 divisors, whose sum is σ = 408092.
Its totient is φ = 408090.
The previous prime is 408077. The next prime is 408127. The reversal of 408091 is 190804.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 408091 - 29 = 407579 is a prime.
It is not a weakly prime, because it can be changed into another prime (408011) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204045 + 204046.
It is an arithmetic number, because the mean of its divisors is an integer number (204046).
2408091 is an apocalyptic number.
408091 is a deficient number, since it is larger than the sum of its proper divisors (1).
408091 is an equidigital number, since it uses as much as digits as its factorization.
408091 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 288, while the sum is 22.
The square root of 408091 is about 638.8200059485.
The cubic root of 408091 is about 74.1741091439.
Adding to 408091 its reverse (190804), we get a palindrome (598895).
The spelling of 408091 in words is "four hundred eight thousand, ninety-one".