243041693 has 2 divisors, whose sum is σ = 243041694. Its totient is φ = 243041692.

The previous prime is 243041671. The next prime is 243041717. The reversal of 243041693 is 396140342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146942884 + 96098809 = 12122^2 + 9803^2 .

It is a cyclic number.

It is not a de Polignac number, because 243041693 - 2¹⁴ = 243025309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243046693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121520846 + 121520847.

It is an arithmetic number, because the mean of its divisors is an integer number (121520847).

Almost surely, 2^243041693 is an apocalyptic number.

It is an amenable number.

243041693 is a deficient number, since it is larger than the sum of its proper divisors (1).

243041693 is an equidigital number, since it uses as much as digits as its factorization.

243041693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 243041693 is about 15589.7945143610. The cubic root of 243041693 is about 624.0608341482.

The spelling of 243041693 in words is "two hundred forty-three million, forty-one thousand, six hundred ninety-three".