9087781 has 2 divisors, whose sum is σ = 9087782. Its totient is φ = 9087780.

The previous prime is 9087769. The next prime is 9087797. The reversal of 9087781 is 1877809.

9087781 is digitally balanced in base 3, 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., 4950625 + 4137156 = 2225^2 + 2034^2 .

It is a cyclic number.

It is not a de Polignac number, because 9087781 - 2⁹ = 9087269 is a prime.

It is a super-2 number, since 2×9087781² = 165175527007922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9087761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4543890 + 4543891.

It is an arithmetic number, because the mean of its divisors is an integer number (4543891).

Almost surely, 2^9087781 is an apocalyptic number.

It is an amenable number.

9087781 is a deficient number, since it is larger than the sum of its proper divisors (1).

9087781 is an equidigital number, since it uses as much as digits as its factorization.

9087781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 9087781 is about 3014.5946659543. The cubic root of 9087781 is about 208.6824615675.

The spelling of 9087781 in words is "nine million, eighty-seven thousand, seven hundred eighty-one".