868716671 has 2 divisors, whose sum is σ = 868716672. Its totient is φ = 868716670.

The previous prime is 868716631. The next prime is 868716683. The reversal of 868716671 is 176617868.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868716671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868716631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434358335 + 434358336.

It is an arithmetic number, because the mean of its divisors is an integer number (434358336).

Almost surely, 2^868716671 is an apocalyptic number.

868716671 is a deficient number, since it is larger than the sum of its proper divisors (1).

868716671 is an equidigital number, since it uses as much as digits as its factorization.

868716671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 50.

The square root of 868716671 is about 29473.9999151795. Note that the first 4 decimals coincide. The cubic root of 868716671 is about 954.1706462521.

The spelling of 868716671 in words is "eight hundred sixty-eight million, seven hundred sixteen thousand, six hundred seventy-one".