86128873 has 2 divisors, whose sum is σ = 86128874. Its totient is φ = 86128872.

The previous prime is 86128853. The next prime is 86128877. The reversal of 86128873 is 37882168.

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., 83685904 + 2442969 = 9148^2 + 1563^2 .

It is a cyclic number.

It is not a de Polignac number, because 86128873 - 2⁵ = 86128841 is a prime.

It is not a weakly prime, because it can be changed into another prime (86128877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43064436 + 43064437.

It is an arithmetic number, because the mean of its divisors is an integer number (43064437).

Almost surely, 2^86128873 is an apocalyptic number.

It is an amenable number.

86128873 is a deficient number, since it is larger than the sum of its proper divisors (1).

86128873 is an equidigital number, since it uses as much as digits as its factorization.

86128873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 43.

The square root of 86128873 is about 9280.5642608626. The cubic root of 86128873 is about 441.6208691724.

The spelling of 86128873 in words is "eighty-six million, one hundred twenty-eight thousand, eight hundred seventy-three".