86935581 has 6 divisors (see below), whose sum is σ = 125573630. Its totient is φ = 57957048.

The previous prime is 86935549. The next prime is 86935631. The reversal of 86935581 is 18553968.

86935581 is a `hidden beast` number, since 8 + 6 + 93 + 558 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 75846681 + 11088900 = 8709^2 + 3330^2 .

It is not a de Polignac number, because 86935581 - 2⁵ = 86935549 is a prime.

It is a super-2 number, since 2×86935581² = 15115590487615122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86935531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4829746 + ... + 4829763.

Almost surely, 2^86935581 is an apocalyptic number.

It is an amenable number.

86935581 is a deficient number, since it is larger than the sum of its proper divisors (38638049).

86935581 is a wasteful number, since it uses less digits than its factorization.

86935581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9659515 (or 9659512 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 86935581 is about 9323.9251927501. The cubic root of 86935581 is about 442.9953697794.

The spelling of 86935581 in words is "eighty-six million, nine hundred thirty-five thousand, five hundred eighty-one".