68486861 has 2 divisors, whose sum is σ = 68486862. Its totient is φ = 68486860.

The previous prime is 68486857. The next prime is 68486923. The reversal of 68486861 is 16868486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68475625 + 11236 = 8275^2 + 106^2 .

It is a cyclic number.

It is not a de Polignac number, because 68486861 - 2² = 68486857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68486461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34243430 + 34243431.

It is an arithmetic number, because the mean of its divisors is an integer number (34243431).

Almost surely, 2^68486861 is an apocalyptic number.

It is an amenable number.

68486861 is a deficient number, since it is larger than the sum of its proper divisors (1).

68486861 is an equidigital number, since it uses as much as digits as its factorization.

68486861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 442368, while the sum is 47.

The square root of 68486861 is about 8275.6788845387. The cubic root of 68486861 is about 409.1373115954.

The spelling of 68486861 in words is "sixty-eight million, four hundred eighty-six thousand, eight hundred sixty-one".