229664209 has 2 divisors, whose sum is σ = 229664210. Its totient is φ = 229664208.

The previous prime is 229664159. The next prime is 229664219. The reversal of 229664209 is 902466922.

It is a happy number.

229664209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229068225 + 595984 = 15135^2 + 772^2 .

It is a cyclic number.

It is not a de Polignac number, because 229664209 - 2⁷ = 229664081 is a prime.

It is not a weakly prime, because it can be changed into another prime (229664219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114832104 + 114832105.

It is an arithmetic number, because the mean of its divisors is an integer number (114832105).

Almost surely, 2^229664209 is an apocalyptic number.

It is an amenable number.

229664209 is a deficient number, since it is larger than the sum of its proper divisors (1).

229664209 is an equidigital number, since it uses as much as digits as its factorization.

229664209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 229664209 is about 15154.6761430260. The cubic root of 229664209 is about 612.3942532421.

The spelling of 229664209 in words is "two hundred twenty-nine million, six hundred sixty-four thousand, two hundred nine".