243514391 has 2 divisors, whose sum is σ = 243514392. Its totient is φ = 243514390.

The previous prime is 243514373. The next prime is 243514423. The reversal of 243514391 is 193415342.

It is an a-pointer prime, because the next prime (243514423) can be obtained adding 243514391 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243514391 - 2²² = 239320087 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243514321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121757195 + 121757196.

It is an arithmetic number, because the mean of its divisors is an integer number (121757196).

Almost surely, 2^243514391 is an apocalyptic number.

243514391 is a deficient number, since it is larger than the sum of its proper divisors (1).

243514391 is an equidigital number, since it uses as much as digits as its factorization.

243514391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 243514391 is about 15604.9476448978. The cubic root of 243514391 is about 624.4651560911.

The spelling of 243514391 in words is "two hundred forty-three million, five hundred fourteen thousand, three hundred ninety-one".