86644843 has 2 divisors, whose sum is σ = 86644844. Its totient is φ = 86644842.

The previous prime is 86644823. The next prime is 86644867. The reversal of 86644843 is 34844668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86644843 - 2⁹ = 86644331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86644843.

It is not a weakly prime, because it can be changed into another prime (86644823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43322421 + 43322422.

It is an arithmetic number, because the mean of its divisors is an integer number (43322422).

Almost surely, 2^86644843 is an apocalyptic number.

86644843 is a deficient number, since it is larger than the sum of its proper divisors (1).

86644843 is an equidigital number, since it uses as much as digits as its factorization.

86644843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 43.

The square root of 86644843 is about 9308.3211697921. The cubic root of 86644843 is about 442.5009828997.

The spelling of 86644843 in words is "eighty-six million, six hundred forty-four thousand, eight hundred forty-three".