239645731243 has 2 divisors, whose sum is σ = 239645731244. Its totient is φ = 239645731242.

The previous prime is 239645731231. The next prime is 239645731327. The reversal of 239645731243 is 342137546932.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239645731243 is a prime.

It is not a weakly prime, because it can be changed into another prime (239645731343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119822865621 + 119822865622.

It is an arithmetic number, because the mean of its divisors is an integer number (119822865622).

Almost surely, 2^239645731243 is an apocalyptic number.

239645731243 is a deficient number, since it is larger than the sum of its proper divisors (1).

239645731243 is an equidigital number, since it uses as much as digits as its factorization.

239645731243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 49.

The spelling of 239645731243 in words is "two hundred thirty-nine billion, six hundred forty-five million, seven hundred thirty-one thousand, two hundred forty-three".