409394023 has 4 divisors (see below), whose sum is σ = 415160208. Its totient is φ = 403627840.

The previous prime is 409394021. The next prime is 409394033. The reversal of 409394023 is 320493904.

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 409394023 - 2¹ = 409394021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 409394023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409394021) 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, 2882986 + ... + 2883127.

It is an arithmetic number, because the mean of its divisors is an integer number (103790052).

Almost surely, 2^409394023 is an apocalyptic number.

409394023 is a deficient number, since it is larger than the sum of its proper divisors (5766185).

409394023 is an equidigital number, since it uses as much as digits as its factorization.

409394023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5766184.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 409394023 is about 20233.4876627832. The cubic root of 409394023 is about 742.5297054552.

The spelling of 409394023 in words is "four hundred nine million, three hundred ninety-four thousand, twenty-three".