229789891 has 2 divisors, whose sum is σ = 229789892. Its totient is φ = 229789890.

The previous prime is 229789873. The next prime is 229789897. The reversal of 229789891 is 198987922.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229789891 is a prime.

It is not a weakly prime, because it can be changed into another prime (229789897) 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, 114894945 + 114894946.

It is an arithmetic number, because the mean of its divisors is an integer number (114894946).

Almost surely, 2^229789891 is an apocalyptic number.

229789891 is a deficient number, since it is larger than the sum of its proper divisors (1).

229789891 is an equidigital number, since it uses as much as digits as its factorization.

229789891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 55.

The square root of 229789891 is about 15158.8222167819. The cubic root of 229789891 is about 612.5059422442.

The spelling of 229789891 in words is "two hundred twenty-nine million, seven hundred eighty-nine thousand, eight hundred ninety-one".