228127789 has 2 divisors, whose sum is σ = 228127790. Its totient is φ = 228127788.

The previous prime is 228127787. The next prime is 228127793. The reversal of 228127789 is 987721822.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165559689 + 62568100 = 12867^2 + 7910^2 .

It is a cyclic number.

It is not a de Polignac number, because 228127789 - 2¹ = 228127787 is a prime.

It is a super-2 number, since 2×228127789² = 104084576228057042, which contains 22 as substring.

Together with 228127787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228127787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114063894 + 114063895.

It is an arithmetic number, because the mean of its divisors is an integer number (114063895).

Almost surely, 2^228127789 is an apocalyptic number.

It is an amenable number.

228127789 is a deficient number, since it is larger than the sum of its proper divisors (1).

228127789 is an equidigital number, since it uses as much as digits as its factorization.

228127789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 46.

The square root of 228127789 is about 15103.8997944240. The cubic root of 228127789 is about 611.0255872738.

The spelling of 228127789 in words is "two hundred twenty-eight million, one hundred twenty-seven thousand, seven hundred eighty-nine".