93581 has 2 divisors, whose sum is σ = 93582. Its totient is φ = 93580.

The previous prime is 93563. The next prime is 93601. The reversal of 93581 is 18539.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75625 + 17956 = 275^2 + 134^2 .

It is an emirp because it is prime and its reverse (18539) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 93581 - 2¹⁰ = 92557 is a prime.

It is a super-2 number, since 2×93581² = 17514807122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 93581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46790 + 46791.

It is an arithmetic number, because the mean of its divisors is an integer number (46791).

2⁹³⁵⁸¹ is an apocalyptic number.

It is an amenable number.

93581 is a deficient number, since it is larger than the sum of its proper divisors (1).

93581 is an equidigital number, since it uses as much as digits as its factorization.

93581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 26.

The square root of 93581 is about 305.9101175182. The cubic root of 93581 is about 45.4007012124.

The spelling of 93581 in words is "ninety-three thousand, five hundred eighty-one".