68455861 has 2 divisors, whose sum is σ = 68455862. Its totient is φ = 68455860.

The previous prime is 68455859. The next prime is 68455867. The reversal of 68455861 is 16855486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49914225 + 18541636 = 7065^2 + 4306^2 .

It is a cyclic number.

It is not a de Polignac number, because 68455861 - 2¹ = 68455859 is a prime.

Together with 68455859, 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 (68455867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34227930 + 34227931.

It is an arithmetic number, because the mean of its divisors is an integer number (34227931).

Almost surely, 2^68455861 is an apocalyptic number.

It is an amenable number.

68455861 is a deficient number, since it is larger than the sum of its proper divisors (1).

68455861 is an equidigital number, since it uses as much as digits as its factorization.

68455861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 43.

The square root of 68455861 is about 8273.8057144219. The cubic root of 68455861 is about 409.0755714280.

The spelling of 68455861 in words is "sixty-eight million, four hundred fifty-five thousand, eight hundred sixty-one".