86944861 has 2 divisors, whose sum is σ = 86944862. Its totient is φ = 86944860.

The previous prime is 86944829. The next prime is 86944909. The reversal of 86944861 is 16844968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74476900 + 12467961 = 8630^2 + 3531^2 .

It is a cyclic number.

It is not a de Polignac number, because 86944861 - 2⁵ = 86944829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86944061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43472430 + 43472431.

It is an arithmetic number, because the mean of its divisors is an integer number (43472431).

Almost surely, 2^86944861 is an apocalyptic number.

It is an amenable number.

86944861 is a deficient number, since it is larger than the sum of its proper divisors (1).

86944861 is an equidigital number, since it uses as much as digits as its factorization.

86944861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 46.

The square root of 86944861 is about 9324.4228239607. The cubic root of 86944861 is about 443.0111318364.

The spelling of 86944861 in words is "eighty-six million, nine hundred forty-four thousand, eight hundred sixty-one".