86358581 has 2 divisors, whose sum is σ = 86358582. Its totient is φ = 86358580.

The previous prime is 86358557. The next prime is 86358593. The reversal of 86358581 is 18585368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65060356 + 21298225 = 8066^2 + 4615^2 .

It is a cyclic number.

It is not a de Polignac number, because 86358581 - 2¹⁴ = 86342197 is a prime.

It is a super-2 number, since 2×86358581² = 14915609024667122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86358551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43179290 + 43179291.

It is an arithmetic number, because the mean of its divisors is an integer number (43179291).

Almost surely, 2^86358581 is an apocalyptic number.

It is an amenable number.

86358581 is a deficient number, since it is larger than the sum of its proper divisors (1).

86358581 is an equidigital number, since it uses as much as digits as its factorization.

86358581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 44.

The square root of 86358581 is about 9292.9317763556. The cubic root of 86358581 is about 442.0131255358.

The spelling of 86358581 in words is "eighty-six million, three hundred fifty-eight thousand, five hundred eighty-one".