86128459 has 2 divisors, whose sum is σ = 86128460. Its totient is φ = 86128458.

The previous prime is 86128429. The next prime is 86128481. The reversal of 86128459 is 95482168.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86128459 - 2²¹ = 84031307 is a prime.

It is a super-2 number, since 2×86128459² = 14836222899429362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86128429) 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, 43064229 + 43064230.

It is an arithmetic number, because the mean of its divisors is an integer number (43064230).

Almost surely, 2^86128459 is an apocalyptic number.

86128459 is a deficient number, since it is larger than the sum of its proper divisors (1).

86128459 is an equidigital number, since it uses as much as digits as its factorization.

86128459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 43.

The square root of 86128459 is about 9280.5419561575. The cubic root of 86128459 is about 441.6201615842.

It can be divided in two parts, 8612 and 8459, that added together give a palindrome (17071).

The spelling of 86128459 in words is "eighty-six million, one hundred twenty-eight thousand, four hundred fifty-nine".