408047 has 4 divisors (see below), whose sum is σ = 415800. Its totient is φ = 400296.

The previous prime is 408041. The next prime is 408049. The reversal of 408047 is 740804.

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 408047 - 2⁸ = 407791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3797 + ... + 3902.

It is an arithmetic number, because the mean of its divisors is an integer number (103950).

2⁴⁰⁸⁰⁴⁷ is an apocalyptic number.

408047 is a deficient number, since it is larger than the sum of its proper divisors (7753).

408047 is an equidigital number, since it uses as much as digits as its factorization.

408047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7752.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 408047 is about 638.7855665245. The cubic root of 408047 is about 74.1714432531.

The spelling of 408047 in words is "four hundred eight thousand, forty-seven".