229743309 has 4 divisors (see below), whose sum is σ = 306324416. Its totient is φ = 153162204.

The previous prime is 229743299. The next prime is 229743317. The reversal of 229743309 is 903347922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 229743309 - 2⁵ = 229743277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229743209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38290549 + ... + 38290554.

It is an arithmetic number, because the mean of its divisors is an integer number (76581104).

Almost surely, 2^229743309 is an apocalyptic number.

It is an amenable number.

229743309 is a deficient number, since it is larger than the sum of its proper divisors (76581107).

229743309 is an equidigital number, since it uses as much as digits as its factorization.

229743309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76581106.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 229743309 is about 15157.2856738929. The cubic root of 229743309 is about 612.4645512734.

The spelling of 229743309 in words is "two hundred twenty-nine million, seven hundred forty-three thousand, three hundred nine".