229409 has 2 divisors, whose sum is σ = 229410. Its totient is φ = 229408.

The previous prime is 229403. The next prime is 229423. The reversal of 229409 is 904922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183184 + 46225 = 428^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 229409 - 2⁴ = 229393 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (229403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114704 + 114705.

It is an arithmetic number, because the mean of its divisors is an integer number (114705).

2²²⁹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

229409 is a deficient number, since it is larger than the sum of its proper divisors (1).

229409 is an equidigital number, since it uses as much as digits as its factorization.

229409 is an odious number, because the sum of its binary digits is odd.

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

The square root of 229409 is about 478.9665959125. The cubic root of 229409 is about 61.2167332887.

The spelling of 229409 in words is "two hundred twenty-nine thousand, four hundred nine".