243823949 has 2 divisors, whose sum is σ = 243823950. Its totient is φ = 243823948.

The previous prime is 243823927. The next prime is 243823961. The reversal of 243823949 is 949328342.

243823949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228221449 + 15602500 = 15107^2 + 3950^2 .

It is a cyclic number.

It is not a de Polignac number, because 243823949 - 2⁸ = 243823693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243823919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121911974 + 121911975.

It is an arithmetic number, because the mean of its divisors is an integer number (121911975).

Almost surely, 2^243823949 is an apocalyptic number.

It is an amenable number.

243823949 is a deficient number, since it is larger than the sum of its proper divisors (1).

243823949 is an equidigital number, since it uses as much as digits as its factorization.

243823949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 44.

The square root of 243823949 is about 15614.8630797711. The cubic root of 243823949 is about 624.7296528901.

The spelling of 243823949 in words is "two hundred forty-three million, eight hundred twenty-three thousand, nine hundred forty-nine".