243836841 has 4 divisors (see below), whose sum is σ = 325115792. Its totient is φ = 162557892.

The previous prime is 243836837. The next prime is 243836891. The reversal of 243836841 is 148638342.

It is a happy number.

243836841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 243836841 - 2² = 243836837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243836841.

It is not an unprimeable number, because it can be changed into a prime (243836821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40639471 + ... + 40639476.

It is an arithmetic number, because the mean of its divisors is an integer number (81278948).

Almost surely, 2^243836841 is an apocalyptic number.

It is an amenable number.

243836841 is a deficient number, since it is larger than the sum of its proper divisors (81278951).

243836841 is an equidigital number, since it uses as much as digits as its factorization.

243836841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81278950.

The product of its digits is 110592, while the sum is 39.

The square root of 243836841 is about 15615.2758861315. The cubic root of 243836841 is about 624.7406633928.

The spelling of 243836841 in words is "two hundred forty-three million, eight hundred thirty-six thousand, eight hundred forty-one".