224999909 has 2 divisors, whose sum is σ = 224999910. Its totient is φ = 224999908.

The previous prime is 224999899. The next prime is 224999911. The reversal of 224999909 is 909999422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129390625 + 95609284 = 11375^2 + 9778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224999909 is a prime.

Together with 224999911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224999959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112499954 + 112499955.

It is an arithmetic number, because the mean of its divisors is an integer number (112499955).

Almost surely, 2^224999909 is an apocalyptic number.

It is an amenable number.

224999909 is a deficient number, since it is larger than the sum of its proper divisors (1).

224999909 is an equidigital number, since it uses as much as digits as its factorization.

224999909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 224999909 is about 14999.9969666664. The cubic root of 224999909 is about 608.2201175602.

The spelling of 224999909 in words is "two hundred twenty-four million, nine hundred ninety-nine thousand, nine hundred nine".