9788989 has 4 divisors (see below), whose sum is σ = 11187424. Its totient is φ = 8390556.

The previous prime is 9788981. The next prime is 9789001. The reversal of 9788989 is 9898879.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9788989 - 2³ = 9788981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9788981) 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, 699207 + ... + 699220.

It is an arithmetic number, because the mean of its divisors is an integer number (2796856).

Almost surely, 2^9788989 is an apocalyptic number.

It is an amenable number.

9788989 is a deficient number, since it is larger than the sum of its proper divisors (1398435).

9788989 is a wasteful number, since it uses less digits than its factorization.

9788989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398434.

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

The square root of 9788989 is about 3128.7360067606. The cubic root of 9788989 is about 213.9173189198.

The spelling of 9788989 in words is "nine million, seven hundred eighty-eight thousand, nine hundred eighty-nine".