227985409 has 2 divisors, whose sum is σ = 227985410. Its totient is φ = 227985408.

The previous prime is 227985397. The next prime is 227985413. The reversal of 227985409 is 904589722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166410000 + 61575409 = 12900^2 + 7847^2 .

It is a cyclic number.

It is not a de Polignac number, because 227985409 - 2⁷ = 227985281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (227985809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113992704 + 113992705.

It is an arithmetic number, because the mean of its divisors is an integer number (113992705).

Almost surely, 2^227985409 is an apocalyptic number.

It is an amenable number.

227985409 is a deficient number, since it is larger than the sum of its proper divisors (1).

227985409 is an equidigital number, since it uses as much as digits as its factorization.

227985409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 227985409 is about 15099.1857065207. The cubic root of 227985409 is about 610.8984422660.

The spelling of 227985409 in words is "two hundred twenty-seven million, nine hundred eighty-five thousand, four hundred nine".