243846749 has 2 divisors, whose sum is σ = 243846750. Its totient is φ = 243846748.

The previous prime is 243846689. The next prime is 243846767. The reversal of 243846749 is 947648342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171426649 + 72420100 = 13093^2 + 8510^2 .

It is a cyclic number.

It is not a de Polignac number, because 243846749 - 2²⁰ = 242798173 is a prime.

It is a super-2 number, since 2×243846749² = 118922473995738002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243846349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121923374 + 121923375.

It is an arithmetic number, because the mean of its divisors is an integer number (121923375).

Almost surely, 2^243846749 is an apocalyptic number.

It is an amenable number.

243846749 is a deficient number, since it is larger than the sum of its proper divisors (1).

243846749 is an equidigital number, since it uses as much as digits as its factorization.

243846749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 47.

The square root of 243846749 is about 15615.5931363493. The cubic root of 243846749 is about 624.7491251257.

The spelling of 243846749 in words is "two hundred forty-three million, eight hundred forty-six thousand, seven hundred forty-nine".