8989987 has 4 divisors (see below), whose sum is σ = 9380880. Its totient is φ = 8599096.

The previous prime is 8989973. The next prime is 8989999. The reversal of 8989987 is 7899898.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8989987 - 2¹¹ = 8987939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8980987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195412 + ... + 195457.

It is an arithmetic number, because the mean of its divisors is an integer number (2345220).

Almost surely, 2^8989987 is an apocalyptic number.

8989987 is a deficient number, since it is larger than the sum of its proper divisors (390893).

8989987 is a wasteful number, since it uses less digits than its factorization.

8989987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390892.

The product of its digits is 2612736, while the sum is 58.

The square root of 8989987 is about 2998.3307022408. The cubic root of 8989987 is about 207.9312133861.

The spelling of 8989987 in words is "eight million, nine hundred eighty-nine thousand, nine hundred eighty-seven".