9087999561 has 27 divisors (see below), whose sum is σ = 13457702349. Its totient is φ = 5909759352.

The previous prime is 9087999527. The next prime is 9087999581. The reversal of 9087999561 is 1659997809.

The square root of 9087999561 is 95331.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 9087999561 - 2¹³ = 9087991369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9087999511) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12297330 + ... + 12298068.

Almost surely, 2^9087999561 is an apocalyptic number.

9087999561 is the 95331-st square number.

9087999561 is the 47666-th centered octagonal number.

It is an amenable number.

9087999561 is a deficient number, since it is larger than the sum of its proper divisors (4369702788).

9087999561 is an frugal number, since it uses more digits than its factorization.

9087999561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 63.

The cubic root of 9087999561 is about 2086.8413449085.

The spelling of 9087999561 in words is "nine billion, eighty-seven million, nine hundred ninety-nine thousand, five hundred sixty-one".