228637 has 2 divisors, whose sum is σ = 228638. Its totient is φ = 228636.

The previous prime is 228619. The next prime is 228647. The reversal of 228637 is 736822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210681 + 17956 = 459^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 228637 - 2⁷ = 228509 is a prime.

It is a Chen prime.

228637 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114318 + 114319.

It is an arithmetic number, because the mean of its divisors is an integer number (114319).

2²²⁸⁶³⁷ is an apocalyptic number.

It is an amenable number.

228637 is a deficient number, since it is larger than the sum of its proper divisors (1).

228637 is an equidigital number, since it uses as much as digits as its factorization.

228637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 228637 is about 478.1600150577. The cubic root of 228637 is about 61.1479879049.

The spelling of 228637 in words is "two hundred twenty-eight thousand, six hundred thirty-seven".