9890987 has 8 divisors (see below), whose sum is σ = 10090080. Its totient is φ = 9694080.

The previous prime is 9890983. The next prime is 9890999. The reversal of 9890987 is 7890989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9890987 - 2² = 9890983 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9890981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10787 + ... + 11667.

It is an arithmetic number, because the mean of its divisors is an integer number (1261260).

Almost surely, 2^9890987 is an apocalyptic number.

9890987 is a deficient number, since it is larger than the sum of its proper divisors (199093).

9890987 is a wasteful number, since it uses less digits than its factorization.

9890987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093.

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

The square root of 9890987 is about 3144.9939586587. The cubic root of 9890987 is about 214.6577355804.

The spelling of 9890987 in words is "nine million, eight hundred ninety thousand, nine hundred eighty-seven".