243124379 has 2 divisors, whose sum is σ = 243124380. Its totient is φ = 243124378.

The previous prime is 243124369. The next prime is 243124381. The reversal of 243124379 is 973421342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243124379 is a prime.

It is a Sophie Germain prime.

Together with 243124381, 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 (243124319) 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, 121562189 + 121562190.

It is an arithmetic number, because the mean of its divisors is an integer number (121562190).

Almost surely, 2^243124379 is an apocalyptic number.

243124379 is a deficient number, since it is larger than the sum of its proper divisors (1).

243124379 is an equidigital number, since it uses as much as digits as its factorization.

243124379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 243124379 is about 15592.4462160368. The cubic root of 243124379 is about 624.1315973752.

The spelling of 243124379 in words is "two hundred forty-three million, one hundred twenty-four thousand, three hundred seventy-nine".