409327091 has 4 divisors (see below), whose sum is σ = 410660712. Its totient is φ = 407993472.

The previous prime is 409327049. The next prime is 409327097. The reversal of 409327091 is 190723904.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 409327091 - 2⁶ = 409327027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409327097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666350 + ... + 666963.

It is an arithmetic number, because the mean of its divisors is an integer number (102665178).

Almost surely, 2^409327091 is an apocalyptic number.

409327091 is a deficient number, since it is larger than the sum of its proper divisors (1333621).

409327091 is a wasteful number, since it uses less digits than its factorization.

409327091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333620.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 409327091 is about 20231.8336044957. The cubic root of 409327091 is about 742.4892377525.

The spelling of 409327091 in words is "four hundred nine million, three hundred twenty-seven thousand, ninety-one".