228809869 has 2 divisors, whose sum is σ = 228809870. Its totient is φ = 228809868.

The previous prime is 228809849. The next prime is 228809879. The reversal of 228809869 is 968908822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226863844 + 1946025 = 15062^2 + 1395^2 .

It is a cyclic number.

It is not a de Polignac number, because 228809869 - 2⁷ = 228809741 is a prime.

It is a super-2 number, since 2×228809869² = 104707912303594322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228809809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114404934 + 114404935.

It is an arithmetic number, because the mean of its divisors is an integer number (114404935).

Almost surely, 2^228809869 is an apocalyptic number.

It is an amenable number.

228809869 is a deficient number, since it is larger than the sum of its proper divisors (1).

228809869 is an equidigital number, since it uses as much as digits as its factorization.

228809869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 228809869 is about 15126.4625408587. The cubic root of 228809869 is about 611.6339504742.

The spelling of 228809869 in words is "two hundred twenty-eight million, eight hundred nine thousand, eight hundred sixty-nine".