68931671 has 2 divisors, whose sum is σ = 68931672. Its totient is φ = 68931670.

The previous prime is 68931661. The next prime is 68931673. The reversal of 68931671 is 17613986.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68931671 is a prime.

Together with 68931673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68931673) 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, 34465835 + 34465836.

It is an arithmetic number, because the mean of its divisors is an integer number (34465836).

Almost surely, 2^68931671 is an apocalyptic number.

68931671 is a deficient number, since it is larger than the sum of its proper divisors (1).

68931671 is an equidigital number, since it uses as much as digits as its factorization.

68931671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 68931671 is about 8302.5099217044. The cubic root of 68931671 is about 410.0211589318.

The spelling of 68931671 in words is "sixty-eight million, nine hundred thirty-one thousand, six hundred seventy-one".