68613871 has 2 divisors, whose sum is σ = 68613872. Its totient is φ = 68613870.

The previous prime is 68613863. The next prime is 68613889. The reversal of 68613871 is 17831686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68613871 - 2³ = 68613863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68613851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34306935 + 34306936.

It is an arithmetic number, because the mean of its divisors is an integer number (34306936).

Almost surely, 2^68613871 is an apocalyptic number.

68613871 is a deficient number, since it is larger than the sum of its proper divisors (1).

68613871 is an equidigital number, since it uses as much as digits as its factorization.

68613871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 68613871 is about 8283.3490207766. The cubic root of 68613871 is about 409.3900726809.

The spelling of 68613871 in words is "sixty-eight million, six hundred thirteen thousand, eight hundred seventy-one".