229143989 has 2 divisors, whose sum is σ = 229143990. Its totient is φ = 229143988.

The previous prime is 229143983. The next prime is 229143991. The reversal of 229143989 is 989341922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223263364 + 5880625 = 14942^2 + 2425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229143989 is a prime.

Together with 229143991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229143983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114571994 + 114571995.

It is an arithmetic number, because the mean of its divisors is an integer number (114571995).

Almost surely, 2^229143989 is an apocalyptic number.

It is an amenable number.

229143989 is a deficient number, since it is larger than the sum of its proper divisors (1).

229143989 is an equidigital number, since it uses as much as digits as its factorization.

229143989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 229143989 is about 15137.5027332780. The cubic root of 229143989 is about 611.9315188514.

The spelling of 229143989 in words is "two hundred twenty-nine million, one hundred forty-three thousand, nine hundred eighty-nine".