68440259 has 2 divisors, whose sum is σ = 68440260. Its totient is φ = 68440258.

The previous prime is 68440243. The next prime is 68440289. The reversal of 68440259 is 95204486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68440259 - 2⁴ = 68440243 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (68440289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34220129 + 34220130.

It is an arithmetic number, because the mean of its divisors is an integer number (34220130).

Almost surely, 2^68440259 is an apocalyptic number.

68440259 is a deficient number, since it is larger than the sum of its proper divisors (1).

68440259 is an equidigital number, since it uses as much as digits as its factorization.

68440259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 68440259 is about 8272.8628055831. The cubic root of 68440259 is about 409.0444911479.

The spelling of 68440259 in words is "sixty-eight million, four hundred forty thousand, two hundred fifty-nine".