229979509 has 4 divisors (see below), whose sum is σ = 230764716. Its totient is φ = 229194304.

The previous prime is 229979489. The next prime is 229979551. The reversal of 229979509 is 905979922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 905979922 = 2 ⋅452989961.

It can be written as a sum of positive squares in 2 ways, for example, as 177822225 + 52157284 = 13335^2 + 7222^2 .

It is a cyclic number.

It is not a de Polignac number, because 229979509 - 2⁹ = 229978997 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 (229979909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392164 + ... + 392749.

It is an arithmetic number, because the mean of its divisors is an integer number (57691179).

Almost surely, 2^229979509 is an apocalyptic number.

It is an amenable number.

229979509 is a deficient number, since it is larger than the sum of its proper divisors (785207).

229979509 is an equidigital number, since it uses as much as digits as its factorization.

229979509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785206.

The product of its (nonzero) digits is 918540, while the sum is 52.

The square root of 229979509 is about 15165.0753047916. The cubic root of 229979509 is about 612.6743717891.

The spelling of 229979509 in words is "two hundred twenty-nine million, nine hundred seventy-nine thousand, five hundred nine".