243114191 has 2 divisors, whose sum is σ = 243114192. Its totient is φ = 243114190.

The previous prime is 243114181. The next prime is 243114241. The reversal of 243114191 is 191411342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243114191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243114191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243114181) 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, 121557095 + 121557096.

It is an arithmetic number, because the mean of its divisors is an integer number (121557096).

Almost surely, 2^243114191 is an apocalyptic number.

243114191 is a deficient number, since it is larger than the sum of its proper divisors (1).

243114191 is an equidigital number, since it uses as much as digits as its factorization.

243114191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 243114191 is about 15592.1195159606. The cubic root of 243114191 is about 624.1228792840.

The spelling of 243114191 in words is "two hundred forty-three million, one hundred fourteen thousand, one hundred ninety-one".