409647 has 8 divisors (see below), whose sum is σ = 624256. Its totient is φ = 234072.

The previous prime is 409639. The next prime is 409657. The reversal of 409647 is 746904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 409647 - 2³ = 409639 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 (409657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9733 + ... + 9774.

It is an arithmetic number, because the mean of its divisors is an integer number (78032).

2⁴⁰⁹⁶⁴⁷ is an apocalyptic number.

409647 is a deficient number, since it is larger than the sum of its proper divisors (214609).

409647 is a wasteful number, since it uses less digits than its factorization.

409647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19517.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 409647 is about 640.0367176967. The cubic root of 409647 is about 74.2682617848.

The spelling of 409647 in words is "four hundred nine thousand, six hundred forty-seven".