9890989 has 16 divisors (see below), whose sum is σ = 10783872. Its totient is φ = 9047808.

The previous prime is 9890983. The next prime is 9890999.

9890989 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 9890989 - 2³ = 9890981 is a prime.

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

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 72129 + ... + 72265.

It is an arithmetic number, because the mean of its divisors is an integer number (673992).

Almost surely, 2^9890989 is an apocalyptic number.

It is an amenable number.

9890989 is a deficient number, since it is larger than the sum of its proper divisors (892883).

9890989 is a wasteful number, since it uses less digits than its factorization.

9890989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276.

The product of its (nonzero) digits is 419904, while the sum is 52.

The square root of 9890989 is about 3144.9942766244. The cubic root of 9890989 is about 214.6577500486.

The spelling of 9890989 in words is "nine million, eight hundred ninety thousand, nine hundred eighty-nine".