243841879 has 2 divisors, whose sum is σ = 243841880. Its totient is φ = 243841878.

The previous prime is 243841853. The next prime is 243841907. The reversal of 243841879 is 978148342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243841879 - 2⁵ = 243841847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243841579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121920939 + 121920940.

It is an arithmetic number, because the mean of its divisors is an integer number (121920940).

Almost surely, 2^243841879 is an apocalyptic number.

243841879 is a deficient number, since it is larger than the sum of its proper divisors (1).

243841879 is an equidigital number, since it uses as much as digits as its factorization.

243841879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 46.

The square root of 243841879 is about 15615.4372016924. The cubic root of 243841879 is about 624.7449660264.

The spelling of 243841879 in words is "two hundred forty-three million, eight hundred forty-one thousand, eight hundred seventy-nine".