229626809 has 2 divisors, whose sum is σ = 229626810. Its totient is φ = 229626808.

The previous prime is 229626791. The next prime is 229626821. The reversal of 229626809 is 908626922.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228765625 + 861184 = 15125^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 229626809 - 2¹² = 229622713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 229626809.

It is not a weakly prime, because it can be changed into another prime (229623809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114813404 + 114813405.

It is an arithmetic number, because the mean of its divisors is an integer number (114813405).

Almost surely, 2^229626809 is an apocalyptic number.

It is an amenable number.

229626809 is a deficient number, since it is larger than the sum of its proper divisors (1).

229626809 is an equidigital number, since it uses as much as digits as its factorization.

229626809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 229626809 is about 15153.4421502179. The cubic root of 229626809 is about 612.3610093618.

The spelling of 229626809 in words is "two hundred twenty-nine million, six hundred twenty-six thousand, eight hundred nine".