243013361 has 2 divisors, whose sum is σ = 243013362. Its totient is φ = 243013360.

The previous prime is 243013307. The next prime is 243013369. The reversal of 243013361 is 163310342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137334961 + 105678400 = 11719^2 + 10280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243013361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243013369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121506680 + 121506681.

It is an arithmetic number, because the mean of its divisors is an integer number (121506681).

Almost surely, 2^243013361 is an apocalyptic number.

It is an amenable number.

243013361 is a deficient number, since it is larger than the sum of its proper divisors (1).

243013361 is an equidigital number, since it uses as much as digits as its factorization.

243013361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 243013361 is about 15588.8858165040. The cubic root of 243013361 is about 624.0365837430.

The spelling of 243013361 in words is "two hundred forty-three million, thirteen thousand, three hundred sixty-one".