243429971 has 2 divisors, whose sum is σ = 243429972. Its totient is φ = 243429970.

The previous prime is 243429959. The next prime is 243430037. The reversal of 243429971 is 179924342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243429971 is a prime.

It is not a weakly prime, because it can be changed into another prime (243429071) 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, 121714985 + 121714986.

It is an arithmetic number, because the mean of its divisors is an integer number (121714986).

Almost surely, 2^243429971 is an apocalyptic number.

243429971 is a deficient number, since it is larger than the sum of its proper divisors (1).

243429971 is an equidigital number, since it uses as much as digits as its factorization.

243429971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 243429971 is about 15602.2424990769. The cubic root of 243429971 is about 624.3929858984.

The spelling of 243429971 in words is "two hundred forty-three million, four hundred twenty-nine thousand, nine hundred seventy-one".