243023147 has 2 divisors, whose sum is σ = 243023148. Its totient is φ = 243023146.

The previous prime is 243023101. The next prime is 243023149. The reversal of 243023147 is 741320342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243023147 is a prime.

Together with 243023149, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243023149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121511573 + 121511574.

It is an arithmetic number, because the mean of its divisors is an integer number (121511574).

Almost surely, 2^243023147 is an apocalyptic number.

243023147 is a deficient number, since it is larger than the sum of its proper divisors (1).

243023147 is an equidigital number, since it uses as much as digits as its factorization.

243023147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 243023147 is about 15589.1996908116. The cubic root of 243023147 is about 624.0449601549.

Adding to 243023147 its reverse (741320342), we get a palindrome (984343489).

The spelling of 243023147 in words is "two hundred forty-three million, twenty-three thousand, one hundred forty-seven".