409147 has 4 divisors (see below), whose sum is σ = 426960. Its totient is φ = 391336.

The previous prime is 409121. The next prime is 409153. The reversal of 409147 is 741904.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8872 + ... + 8917.

It is an arithmetic number, because the mean of its divisors is an integer number (106740).

2⁴⁰⁹¹⁴⁷ is an apocalyptic number.

409147 is a deficient number, since it is larger than the sum of its proper divisors (17813).

409147 is a wasteful number, since it uses less digits than its factorization.

409147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17812.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 409147 is about 639.6459958446. The cubic root of 409147 is about 74.2380331170.

The spelling of 409147 in words is "four hundred nine thousand, one hundred forty-seven".