229493909 has 2 divisors, whose sum is σ = 229493910. Its totient is φ = 229493908.

The previous prime is 229493879. The next prime is 229493923. The reversal of 229493909 is 909394922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228674884 + 819025 = 15122^2 + 905^2 .

It is a cyclic number.

It is not a de Polignac number, because 229493909 - 2¹⁶ = 229428373 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229493959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114746954 + 114746955.

It is an arithmetic number, because the mean of its divisors is an integer number (114746955).

Almost surely, 2^229493909 is an apocalyptic number.

It is an amenable number.

229493909 is a deficient number, since it is larger than the sum of its proper divisors (1).

229493909 is an equidigital number, since it uses as much as digits as its factorization.

229493909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 229493909 is about 15149.0563732531. The cubic root of 229493909 is about 612.2428488211.

The spelling of 229493909 in words is "two hundred twenty-nine million, four hundred ninety-three thousand, nine hundred nine".