243848639 has 2 divisors, whose sum is σ = 243848640. Its totient is φ = 243848638.

The previous prime is 243848533. The next prime is 243848677. The reversal of 243848639 is 936848342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243848639 - 2⁸ = 243848383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243848593 and 243848602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243848039) 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, 121924319 + 121924320.

It is an arithmetic number, because the mean of its divisors is an integer number (121924320).

Almost surely, 2^243848639 is an apocalyptic number.

243848639 is a deficient number, since it is larger than the sum of its proper divisors (1).

243848639 is an equidigital number, since it uses as much as digits as its factorization.

243848639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 47.

The square root of 243848639 is about 15615.6536526653. The cubic root of 243848639 is about 624.7507392170.

The spelling of 243848639 in words is "two hundred forty-three million, eight hundred forty-eight thousand, six hundred thirty-nine".