68634971 has 2 divisors, whose sum is σ = 68634972. Its totient is φ = 68634970.

The previous prime is 68634949. The next prime is 68634989. The reversal of 68634971 is 17943686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68634971 - 2¹⁴ = 68618587 is a prime.

It is not a weakly prime, because it can be changed into another prime (68634911) 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, 34317485 + 34317486.

It is an arithmetic number, because the mean of its divisors is an integer number (34317486).

Almost surely, 2^68634971 is an apocalyptic number.

68634971 is a deficient number, since it is larger than the sum of its proper divisors (1).

68634971 is an equidigital number, since it uses as much as digits as its factorization.

68634971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 68634971 is about 8284.6225623139. The cubic root of 68634971 is about 409.4320333180.

The spelling of 68634971 in words is "sixty-eight million, six hundred thirty-four thousand, nine hundred seventy-one".