243015893 has 2 divisors, whose sum is σ = 243015894. Its totient is φ = 243015892.

The previous prime is 243015863. The next prime is 243015931. The reversal of 243015893 is 398510342.

243015893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231739729 + 11276164 = 15223^2 + 3358^2 .

It is a cyclic number.

It is not a de Polignac number, because 243015893 - 2¹⁴ = 242999509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243015863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121507946 + 121507947.

It is an arithmetic number, because the mean of its divisors is an integer number (121507947).

Almost surely, 2^243015893 is an apocalyptic number.

It is an amenable number.

243015893 is a deficient number, since it is larger than the sum of its proper divisors (1).

243015893 is an equidigital number, since it uses as much as digits as its factorization.

243015893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 243015893 is about 15588.9670279977. The cubic root of 243015893 is about 624.0387510520.

The spelling of 243015893 in words is "two hundred forty-three million, fifteen thousand, eight hundred ninety-three".