268140239 has 2 divisors, whose sum is σ = 268140240. Its totient is φ = 268140238.

The previous prime is 268140227. The next prime is 268140241. The reversal of 268140239 is 932041862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268140239 is a prime.

Together with 268140241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 268140199 and 268140208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268140259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134070119 + 134070120.

It is an arithmetic number, because the mean of its divisors is an integer number (134070120).

Almost surely, 2^268140239 is an apocalyptic number.

268140239 is a deficient number, since it is larger than the sum of its proper divisors (1).

268140239 is an equidigital number, since it uses as much as digits as its factorization.

268140239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 268140239 is about 16374.9882137362. The cubic root of 268140239 is about 644.8430112893.

The spelling of 268140239 in words is "two hundred sixty-eight million, one hundred forty thousand, two hundred thirty-nine".