80865089 has 2 divisors, whose sum is σ = 80865090. Its totient is φ = 80865088.

The previous prime is 80865067. The next prime is 80865101. The reversal of 80865089 is 98056808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80856064 + 9025 = 8992^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 80865089 - 2¹⁶ = 80799553 is a prime.

It is not a weakly prime, because it can be changed into another prime (80865289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40432544 + 40432545.

It is an arithmetic number, because the mean of its divisors is an integer number (40432545).

Almost surely, 2^80865089 is an apocalyptic number.

It is an amenable number.

80865089 is a deficient number, since it is larger than the sum of its proper divisors (1).

80865089 is an equidigital number, since it uses as much as digits as its factorization.

80865089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 80865089 is about 8992.5018209617. The cubic root of 80865089 is about 432.4345211441.

The spelling of 80865089 in words is "eighty million, eight hundred sixty-five thousand, eighty-nine".