409229 has 4 divisors (see below), whose sum is σ = 417984. Its totient is φ = 400476.

The previous prime is 409217. The next prime is 409237. The reversal of 409229 is 922904.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 409198 and 409207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4307 + ... + 4400.

It is an arithmetic number, because the mean of its divisors is an integer number (104496).

2⁴⁰⁹²²⁹ is an apocalyptic number.

It is an amenable number.

409229 is a deficient number, since it is larger than the sum of its proper divisors (8755).

409229 is an equidigital number, since it uses as much as digits as its factorization.

409229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8754.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 409229 is about 639.7100905879. The cubic root of 409229 is about 74.2429923061.

The spelling of 409229 in words is "four hundred nine thousand, two hundred twenty-nine".