229967209 has 2 divisors, whose sum is σ = 229967210. Its totient is φ = 229967208.

The previous prime is 229967201. The next prime is 229967233. The reversal of 229967209 is 902769922.

229967209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202635225 + 27331984 = 14235^2 + 5228^2 .

It is a cyclic number.

It is not a de Polignac number, because 229967209 - 2³ = 229967201 is a prime.

It is not a weakly prime, because it can be changed into another prime (229967201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114983604 + 114983605.

It is an arithmetic number, because the mean of its divisors is an integer number (114983605).

Almost surely, 2^229967209 is an apocalyptic number.

It is an amenable number.

229967209 is a deficient number, since it is larger than the sum of its proper divisors (1).

229967209 is an equidigital number, since it uses as much as digits as its factorization.

229967209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 229967209 is about 15164.6697623127. The cubic root of 229967209 is about 612.6634490347.

Adding to 229967209 its product of nonzero digits (244944), we get a triangular number (230212153 = T₂₁₄₅₇).

The spelling of 229967209 in words is "two hundred twenty-nine million, nine hundred sixty-seven thousand, two hundred nine".