8406184861 has 2 divisors, whose sum is σ = 8406184862. Its totient is φ = 8406184860.

The previous prime is 8406184823. The next prime is 8406184883. The reversal of 8406184861 is 1684816048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7924382361 + 481802500 = 89019^2 + 21950^2 .

It is a cyclic number.

It is not a de Polignac number, because 8406184861 - 2⁷ = 8406184733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8406184261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4203092430 + 4203092431.

It is an arithmetic number, because the mean of its divisors is an integer number (4203092431).

Almost surely, 2^8406184861 is an apocalyptic number.

It is an amenable number.

8406184861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8406184861 is an equidigital number, since it uses as much as digits as its factorization.

8406184861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294912, while the sum is 46.

The square root of 8406184861 is about 91685.2488735238. The cubic root of 8406184861 is about 2033.2915015641.

The spelling of 8406184861 in words is "eight billion, four hundred six million, one hundred eighty-four thousand, eight hundred sixty-one".