229517909 has 2 divisors, whose sum is σ = 229517910. Its totient is φ = 229517908.

The previous prime is 229517903. The next prime is 229517923. The reversal of 229517909 is 909715922.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216737284 + 12780625 = 14722^2 + 3575^2 .

It is a cyclic number.

It is not a de Polignac number, because 229517909 - 2²⁰ = 228469333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 229517909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229517903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114758954 + 114758955.

It is an arithmetic number, because the mean of its divisors is an integer number (114758955).

Almost surely, 2^229517909 is an apocalyptic number.

It is an amenable number.

229517909 is a deficient number, since it is larger than the sum of its proper divisors (1).

229517909 is an equidigital number, since it uses as much as digits as its factorization.

229517909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 229517909 is about 15149.8484810905. The cubic root of 229517909 is about 612.2641904423.

The spelling of 229517909 in words is "two hundred twenty-nine million, five hundred seventeen thousand, nine hundred nine".