8987899521 has 16 divisors (see below), whose sum is σ = 12013052480. Its totient is φ = 5977359360.

The previous prime is 8987899513. The next prime is 8987899553. The reversal of 8987899521 is 1259987898.

It is not a de Polignac number, because 8987899521 - 2³ = 8987899513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8987899421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4216626 + ... + 4218756.

It is an arithmetic number, because the mean of its divisors is an integer number (750815780).

Almost surely, 2^8987899521 is an apocalyptic number.

It is an amenable number.

8987899521 is a deficient number, since it is larger than the sum of its proper divisors (3025152959).

8987899521 is a wasteful number, since it uses less digits than its factorization.

8987899521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896.

The product of its digits is 26127360, while the sum is 66.

The square root of 8987899521 is about 94804.5332302206. The cubic root of 8987899521 is about 2079.1511823337.

The spelling of 8987899521 in words is "eight billion, nine hundred eighty-seven million, eight hundred ninety-nine thousand, five hundred twenty-one".