68957171 has 2 divisors, whose sum is σ = 68957172. Its totient is φ = 68957170.

The previous prime is 68957153. The next prime is 68957173. The reversal of 68957171 is 17175986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68957171 - 2⁶ = 68957107 is a prime.

Together with 68957173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68957173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34478585 + 34478586.

It is an arithmetic number, because the mean of its divisors is an integer number (34478586).

Almost surely, 2^68957171 is an apocalyptic number.

68957171 is a deficient number, since it is larger than the sum of its proper divisors (1).

68957171 is an equidigital number, since it uses as much as digits as its factorization.

68957171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 44.

The square root of 68957171 is about 8304.0454598948. The cubic root of 68957171 is about 410.0717126197.

The spelling of 68957171 in words is "sixty-eight million, nine hundred fifty-seven thousand, one hundred seventy-one".