8990987 has 4 divisors (see below), whose sum is σ = 9028536. Its totient is φ = 8953440.

The previous prime is 8990981. The next prime is 8991001. The reversal of 8990987 is 7890998.

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 8990987 - 2⁸ = 8990731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8990981) 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, 18413 + ... + 18894.

It is an arithmetic number, because the mean of its divisors is an integer number (2257134).

Almost surely, 2^8990987 is an apocalyptic number.

8990987 is a deficient number, since it is larger than the sum of its proper divisors (37549).

8990987 is a wasteful number, since it uses less digits than its factorization.

8990987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37548.

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 8990987 is about 2998.4974570608. The cubic root of 8990987 is about 207.9389228338.

The spelling of 8990987 in words is "eight million, nine hundred ninety thousand, nine hundred eighty-seven".