243308941 has 2 divisors, whose sum is σ = 243308942. Its totient is φ = 243308940.

The previous prime is 243308917. The next prime is 243308963. The reversal of 243308941 is 149803342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194602500 + 48706441 = 13950^2 + 6979^2 .

It is a cyclic number.

It is not a de Polignac number, because 243308941 - 2¹¹ = 243306893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243308897 and 243308906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243308911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121654470 + 121654471.

It is an arithmetic number, because the mean of its divisors is an integer number (121654471).

Almost surely, 2^243308941 is an apocalyptic number.

It is an amenable number.

243308941 is a deficient number, since it is larger than the sum of its proper divisors (1).

243308941 is an equidigital number, since it uses as much as digits as its factorization.

243308941 is an evil number, because the sum of its binary digits is even.

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

The square root of 243308941 is about 15598.3634077425. The cubic root of 243308941 is about 624.2894889045.

The spelling of 243308941 in words is "two hundred forty-three million, three hundred eight thousand, nine hundred forty-one".