4086842861 has 2 divisors, whose sum is σ = 4086842862. Its totient is φ = 4086842860.

The previous prime is 4086842831. The next prime is 4086842869. The reversal of 4086842861 is 1682486804.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3472744900 + 614097961 = 58930^2 + 24781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4086842861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4086842869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2043421430 + 2043421431.

It is an arithmetic number, because the mean of its divisors is an integer number (2043421431).

Almost surely, 2^4086842861 is an apocalyptic number.

It is an amenable number.

4086842861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4086842861 is an equidigital number, since it uses as much as digits as its factorization.

4086842861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 589824, while the sum is 47.

The square root of 4086842861 is about 63928.4198224858. The cubic root of 4086842861 is about 1598.8067745471.

The spelling of 4086842861 in words is "four billion, eighty-six million, eight hundred forty-two thousand, eight hundred sixty-one".