243900941 has 2 divisors, whose sum is σ = 243900942. Its totient is φ = 243900940.

The previous prime is 243900883. The next prime is 243901027. The reversal of 243900941 is 149009342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241926916 + 1974025 = 15554^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 243900941 - 2¹⁸ = 243638797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243900898 and 243900907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243900341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121950470 + 121950471.

It is an arithmetic number, because the mean of its divisors is an integer number (121950471).

Almost surely, 2^243900941 is an apocalyptic number.

It is an amenable number.

243900941 is a deficient number, since it is larger than the sum of its proper divisors (1).

243900941 is an equidigital number, since it uses as much as digits as its factorization.

243900941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 243900941 is about 15617.3282286056. The cubic root of 243900941 is about 624.7954026845.

The spelling of 243900941 in words is "two hundred forty-three million, nine hundred thousand, nine hundred forty-one".