228706823 has 2 divisors, whose sum is σ = 228706824. Its totient is φ = 228706822.

The previous prime is 228706801. The next prime is 228706889. The reversal of 228706823 is 328607822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228706823 - 2²⁶ = 161597959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228706223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114353411 + 114353412.

It is an arithmetic number, because the mean of its divisors is an integer number (114353412).

Almost surely, 2^228706823 is an apocalyptic number.

228706823 is a deficient number, since it is larger than the sum of its proper divisors (1).

228706823 is an equidigital number, since it uses as much as digits as its factorization.

228706823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 228706823 is about 15123.0560073022. The cubic root of 228706823 is about 611.5421189226.

Subtracting 228706823 from its reverse (328607822), we obtain a palindrome (99900999).

The spelling of 228706823 in words is "two hundred twenty-eight million, seven hundred six thousand, eight hundred twenty-three".