225668969 has 2 divisors, whose sum is σ = 225668970. Its totient is φ = 225668968.

The previous prime is 225668959. The next prime is 225668987. The reversal of 225668969 is 969866522.

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., 168091225 + 57577744 = 12965^2 + 7588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225668969 is a prime.

It is a super-2 number, since 2×225668969² = 101852967139045922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225668969.

It is not a weakly prime, because it can be changed into another prime (225668929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112834484 + 112834485.

It is an arithmetic number, because the mean of its divisors is an integer number (112834485).

Almost surely, 2^225668969 is an apocalyptic number.

It is an amenable number.

225668969 is a deficient number, since it is larger than the sum of its proper divisors (1).

225668969 is an equidigital number, since it uses as much as digits as its factorization.

225668969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 53.

The square root of 225668969 is about 15022.2824164639. The cubic root of 225668969 is about 608.8223890068.

The spelling of 225668969 in words is "two hundred twenty-five million, six hundred sixty-eight thousand, nine hundred sixty-nine".