243720841 has 8 divisors (see below), whose sum is σ = 299964224. Its totient is φ = 192834000.

The previous prime is 243720833. The next prime is 243720859. The reversal of 243720841 is 148027342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243720841 - 2³ = 243720833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243720821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1339035 + ... + 1339216.

It is an arithmetic number, because the mean of its divisors is an integer number (37495528).

Almost surely, 2^243720841 is an apocalyptic number.

It is an amenable number.

243720841 is a deficient number, since it is larger than the sum of its proper divisors (56243383).

243720841 is a wasteful number, since it uses less digits than its factorization.

243720841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678271.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 243720841 is about 15611.5611326991. The cubic root of 243720841 is about 624.6415788141.

The spelling of 243720841 in words is "two hundred forty-three million, seven hundred twenty thousand, eight hundred forty-one".