68440859 has 2 divisors, whose sum is σ = 68440860. Its totient is φ = 68440858.

The previous prime is 68440843. The next prime is 68440909. The reversal of 68440859 is 95804486.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68440859 - 2⁴ = 68440843 is a prime.

It is not a weakly prime, because it can be changed into another prime (68440259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34220429 + 34220430.

It is an arithmetic number, because the mean of its divisors is an integer number (34220430).

Almost surely, 2^68440859 is an apocalyptic number.

68440859 is a deficient number, since it is larger than the sum of its proper divisors (1).

68440859 is an equidigital number, since it uses as much as digits as its factorization.

68440859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 68440859 is about 8272.8990686458. The cubic root of 68440859 is about 409.0456864773.

The spelling of 68440859 in words is "sixty-eight million, four hundred forty thousand, eight hundred fifty-nine".