227788289 has 2 divisors, whose sum is σ = 227788290. Its totient is φ = 227788288.

The previous prime is 227788201. The next prime is 227788303. The reversal of 227788289 is 982887722.

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., 206784400 + 21003889 = 14380^2 + 4583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-227788289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 227788289.

It is not a weakly prime, because it can be changed into another prime (227788789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113894144 + 113894145.

It is an arithmetic number, because the mean of its divisors is an integer number (113894145).

Almost surely, 2^227788289 is an apocalyptic number.

It is an amenable number.

227788289 is a deficient number, since it is larger than the sum of its proper divisors (1).

227788289 is an equidigital number, since it uses as much as digits as its factorization.

227788289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 53.

The square root of 227788289 is about 15092.6567906383. The cubic root of 227788289 is about 610.7223271600.

The spelling of 227788289 in words is "two hundred twenty-seven million, seven hundred eighty-eight thousand, two hundred eighty-nine".