68187871 has 2 divisors, whose sum is σ = 68187872. Its totient is φ = 68187870.

The previous prime is 68187869. The next prime is 68187877. The reversal of 68187871 is 17878186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68187871 - 2¹ = 68187869 is a prime.

Together with 68187869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68187877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34093935 + 34093936.

It is an arithmetic number, because the mean of its divisors is an integer number (34093936).

Almost surely, 2^68187871 is an apocalyptic number.

68187871 is a deficient number, since it is larger than the sum of its proper divisors (1).

68187871 is an equidigital number, since it uses as much as digits as its factorization.

68187871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 46.

The square root of 68187871 is about 8257.5947466560. The cubic root of 68187871 is about 408.5410589716.

The spelling of 68187871 in words is "sixty-eight million, one hundred eighty-seven thousand, eight hundred seventy-one".