68618971 has 2 divisors, whose sum is σ = 68618972. Its totient is φ = 68618970.

The previous prime is 68618969. The next prime is 68618999. The reversal of 68618971 is 17981686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68618971 - 2¹ = 68618969 is a prime.

Together with 68618969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68618071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34309485 + 34309486.

It is an arithmetic number, because the mean of its divisors is an integer number (34309486).

Almost surely, 2^68618971 is an apocalyptic number.

68618971 is a deficient number, since it is larger than the sum of its proper divisors (1).

68618971 is an equidigital number, since it uses as much as digits as its factorization.

68618971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 68618971 is about 8283.6568615558. The cubic root of 68618971 is about 409.4002156136.

The spelling of 68618971 in words is "sixty-eight million, six hundred eighteen thousand, nine hundred seventy-one".