228537689 has 2 divisors, whose sum is σ = 228537690. Its totient is φ = 228537688.

The previous prime is 228537679. The next prime is 228537703. The reversal of 228537689 is 986735822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188595289 + 39942400 = 13733^2 + 6320^2 .

It is a cyclic number.

It is not a de Polignac number, because 228537689 - 2⁸ = 228537433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228537619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114268844 + 114268845.

It is an arithmetic number, because the mean of its divisors is an integer number (114268845).

Almost surely, 2^228537689 is an apocalyptic number.

It is an amenable number.

228537689 is a deficient number, since it is larger than the sum of its proper divisors (1).

228537689 is an equidigital number, since it uses as much as digits as its factorization.

228537689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 50.

The square root of 228537689 is about 15117.4630477471. The cubic root of 228537689 is about 611.3913318862.

The spelling of 228537689 in words is "two hundred twenty-eight million, five hundred thirty-seven thousand, six hundred eighty-nine".