228123239 has 2 divisors, whose sum is σ = 228123240. Its totient is φ = 228123238.

The previous prime is 228123209. The next prime is 228123263. The reversal of 228123239 is 932321822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228123239 is a prime.

It is a super-2 number, since 2×228123239² = 104080424343702242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228123209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114061619 + 114061620.

It is an arithmetic number, because the mean of its divisors is an integer number (114061620).

Almost surely, 2^228123239 is an apocalyptic number.

228123239 is a deficient number, since it is larger than the sum of its proper divisors (1).

228123239 is an equidigital number, since it uses as much as digits as its factorization.

228123239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 228123239 is about 15103.7491703219. The cubic root of 228123239 is about 611.0215249528.

The spelling of 228123239 in words is "two hundred twenty-eight million, one hundred twenty-three thousand, two hundred thirty-nine".