228761189 has 2 divisors, whose sum is σ = 228761190. Its totient is φ = 228761188.

The previous prime is 228761171. The next prime is 228761191. The reversal of 228761189 is 981167822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185858689 + 42902500 = 13633^2 + 6550^2 .

It is a cyclic number.

It is not a de Polignac number, because 228761189 - 2⁸ = 228760933 is a prime.

Together with 228761191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228161189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114380594 + 114380595.

It is an arithmetic number, because the mean of its divisors is an integer number (114380595).

Almost surely, 2^228761189 is an apocalyptic number.

It is an amenable number.

228761189 is a deficient number, since it is larger than the sum of its proper divisors (1).

228761189 is an equidigital number, since it uses as much as digits as its factorization.

228761189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 228761189 is about 15124.8533546610. The cubic root of 228761189 is about 611.5905717327.

The spelling of 228761189 in words is "two hundred twenty-eight million, seven hundred sixty-one thousand, one hundred eighty-nine".