243161323 has 2 divisors, whose sum is σ = 243161324. Its totient is φ = 243161322.

The previous prime is 243161287. The next prime is 243161333. The reversal of 243161323 is 323161342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243161323 is a prime.

It is a super-2 number, since 2×243161323² = 118254858006220658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243161333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121580661 + 121580662.

It is an arithmetic number, because the mean of its divisors is an integer number (121580662).

Almost surely, 2^243161323 is an apocalyptic number.

243161323 is a deficient number, since it is larger than the sum of its proper divisors (1).

243161323 is an equidigital number, since it uses as much as digits as its factorization.

243161323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

The square root of 243161323 is about 15593.6308472402. The cubic root of 243161323 is about 624.1632091096.

The spelling of 243161323 in words is "two hundred forty-three million, one hundred sixty-one thousand, three hundred twenty-three".