228336989 has 2 divisors, whose sum is σ = 228336990. Its totient is φ = 228336988.

The previous prime is 228336973. The next prime is 228337001. The reversal of 228336989 is 989633822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227014489 + 1322500 = 15067^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 228336989 - 2⁴ = 228336973 is a prime.

It is a super-2 number, since 2×228336989² = 104275561091172242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228336289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114168494 + 114168495.

It is an arithmetic number, because the mean of its divisors is an integer number (114168495).

Almost surely, 2^228336989 is an apocalyptic number.

It is an amenable number.

228336989 is a deficient number, since it is larger than the sum of its proper divisors (1).

228336989 is an equidigital number, since it uses as much as digits as its factorization.

228336989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 50.

The square root of 228336989 is about 15110.8235712022. The cubic root of 228336989 is about 611.2123064510.

The spelling of 228336989 in words is "two hundred twenty-eight million, three hundred thirty-six thousand, nine hundred eighty-nine".