228913 has 2 divisors, whose sum is σ = 228914. Its totient is φ = 228912.

The previous prime is 228911. The next prime is 228923. The reversal of 228913 is 319822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223729 + 5184 = 473^2 + 72^2 .

It is a cyclic number.

It is not a de Polignac number, because 228913 - 2¹ = 228911 is a prime.

Together with 228911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (228911) 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, 114456 + 114457.

It is an arithmetic number, because the mean of its divisors is an integer number (114457).

2²²⁸⁹¹³ is an apocalyptic number.

It is an amenable number.

228913 is a deficient number, since it is larger than the sum of its proper divisors (1).

228913 is an equidigital number, since it uses as much as digits as its factorization.

228913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 228913 is about 478.4485343274. The cubic root of 228913 is about 61.1725830174.

Subtracting 228913 from its reverse (319822), we obtain a palindrome (90909).

The spelling of 228913 in words is "two hundred twenty-eight thousand, nine hundred thirteen".