243841903 has 8 divisors (see below), whose sum is σ = 247656096. Its totient is φ = 240038400.

The previous prime is 243841879. The next prime is 243841907. The reversal of 243841903 is 309148342.

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 243841903 - 2²¹ = 241744751 is a prime.

It is a super-2 number, since 2×243841903² = 118917747317322818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243841907) 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 in 7 ways as a sum of consecutive naturals, for example, 51775 + ... + 56287.

It is an arithmetic number, because the mean of its divisors is an integer number (30957012).

Almost surely, 2^243841903 is an apocalyptic number.

243841903 is a deficient number, since it is larger than the sum of its proper divisors (3814193).

243841903 is an equidigital number, since it uses as much as digits as its factorization.

243841903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 243841903 is about 15615.4379701627. The cubic root of 243841903 is about 624.7449865232.

The spelling of 243841903 in words is "two hundred forty-three million, eight hundred forty-one thousand, nine hundred three".