234809 has 2 divisors, whose sum is σ = 234810. Its totient is φ = 234808.

The previous prime is 234803. The next prime is 234811. The reversal of 234809 is 908432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 41209 = 440^2 + 203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-234809 is a prime.

Together with 234811, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 234809.

It is not a weakly prime, because it can be changed into another prime (234803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117404 + 117405.

It is an arithmetic number, because the mean of its divisors is an integer number (117405).

2²³⁴⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

234809 is a deficient number, since it is larger than the sum of its proper divisors (1).

234809 is an equidigital number, since it uses as much as digits as its factorization.

234809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 234809 is about 484.5709442383. The cubic root of 234809 is about 61.6933347848.

The spelling of 234809 in words is "two hundred thirty-four thousand, eight hundred nine".