228989 has 2 divisors, whose sum is σ = 228990. Its totient is φ = 228988.

The previous prime is 228983. The next prime is 229003. The reversal of 228989 is 989822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225625 + 3364 = 475^2 + 58^2 .

It is a cyclic number.

It is not a de Polignac number, because 228989 - 2⁸ = 228733 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114494 + 114495.

It is an arithmetic number, because the mean of its divisors is an integer number (114495).

2²²⁸⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

228989 is a deficient number, since it is larger than the sum of its proper divisors (1).

228989 is an equidigital number, since it uses as much as digits as its factorization.

228989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 228989 is about 478.5279511168. The cubic root of 228989 is about 61.1793521129.

The spelling of 228989 in words is "two hundred twenty-eight thousand, nine hundred eighty-nine".