87588581 has 2 divisors, whose sum is σ = 87588582. Its totient is φ = 87588580.

The previous prime is 87588569. The next prime is 87588593. The reversal of 87588581 is 18588578.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (87588569) and next prime (87588593).

It can be written as a sum of positive squares in only one way, i.e., 61230625 + 26357956 = 7825^2 + 5134^2 .

It is a cyclic number.

It is not a de Polignac number, because 87588581 - 2⁶ = 87588517 is a prime.

It is a super-2 number, since 2×87588581² = 15343519043187122, 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 (87588521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43794290 + 43794291.

It is an arithmetic number, because the mean of its divisors is an integer number (43794291).

Almost surely, 2^87588581 is an apocalyptic number.

It is an amenable number.

87588581 is a deficient number, since it is larger than the sum of its proper divisors (1).

87588581 is an equidigital number, since it uses as much as digits as its factorization.

87588581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 716800, while the sum is 50.

The square root of 87588581 is about 9358.8771228177. The cubic root of 87588581 is about 444.1017625823.

The spelling of 87588581 in words is "eighty-seven million, five hundred eighty-eight thousand, five hundred eighty-one".