68116861 has 2 divisors, whose sum is σ = 68116862. Its totient is φ = 68116860.

The previous prime is 68116849. The next prime is 68116879. The reversal of 68116861 is 16861186.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66928761 + 1188100 = 8181^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 68116861 - 2⁷ = 68116733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68116861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68116891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34058430 + 34058431.

It is an arithmetic number, because the mean of its divisors is an integer number (34058431).

Almost surely, 2^68116861 is an apocalyptic number.

It is an amenable number.

68116861 is a deficient number, since it is larger than the sum of its proper divisors (1).

68116861 is an equidigital number, since it uses as much as digits as its factorization.

68116861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 37.

The square root of 68116861 is about 8253.2939484790. The cubic root of 68116861 is about 408.3991931902.

The spelling of 68116861 in words is "sixty-eight million, one hundred sixteen thousand, eight hundred sixty-one".