68187311 has 2 divisors, whose sum is σ = 68187312. Its totient is φ = 68187310.

The previous prime is 68187283. The next prime is 68187313. The reversal of 68187311 is 11378186.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68187311 is a prime.

Together with 68187313, 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 (68187313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34093655 + 34093656.

It is an arithmetic number, because the mean of its divisors is an integer number (34093656).

Almost surely, 2^68187311 is an apocalyptic number.

68187311 is a deficient number, since it is larger than the sum of its proper divisors (1).

68187311 is an equidigital number, since it uses as much as digits as its factorization.

68187311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 35.

The square root of 68187311 is about 8257.5608384074. The cubic root of 68187311 is about 408.5399405732.

The spelling of 68187311 in words is "sixty-eight million, one hundred eighty-seven thousand, three hundred eleven".