229743809 has 2 divisors, whose sum is σ = 229743810. Its totient is φ = 229743808.

The previous prime is 229743733. The next prime is 229743823. The reversal of 229743809 is 908347922.

229743809 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., 223353025 + 6390784 = 14945^2 + 2528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229743809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 229743809.

It is not a weakly prime, because it can be changed into another prime (229743209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114871904 + 114871905.

It is an arithmetic number, because the mean of its divisors is an integer number (114871905).

Almost surely, 2^229743809 is an apocalyptic number.

It is an amenable number.

229743809 is a deficient number, since it is larger than the sum of its proper divisors (1).

229743809 is an equidigital number, since it uses as much as digits as its factorization.

229743809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 229743809 is about 15157.3021676023. The cubic root of 229743809 is about 612.4649955839.

The spelling of 229743809 in words is "two hundred twenty-nine million, seven hundred forty-three thousand, eight hundred nine".