9662581 has 2 divisors, whose sum is σ = 9662582. Its totient is φ = 9662580.

The previous prime is 9662561. The next prime is 9662617. The reversal of 9662581 is 1852669.

9662581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8122500 + 1540081 = 2850^2 + 1241^2 .

It is a cyclic number.

It is not a de Polignac number, because 9662581 - 2¹¹ = 9660533 is a prime.

It is a super-2 number, since 2×9662581² = 186730943163122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9662581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9662551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4831290 + 4831291.

It is an arithmetic number, because the mean of its divisors is an integer number (4831291).

Almost surely, 2^9662581 is an apocalyptic number.

It is an amenable number.

9662581 is a deficient number, since it is larger than the sum of its proper divisors (1).

9662581 is an equidigital number, since it uses as much as digits as its factorization.

9662581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 9662581 is about 3108.4692374222. The cubic root of 9662581 is about 212.9925350231.

The spelling of 9662581 in words is "nine million, six hundred sixty-two thousand, five hundred eighty-one".