9789138 has 12 divisors (see below), whose sum is σ = 21209838. Its totient is φ = 3263040.

The previous prime is 9789137. The next prime is 9789173. The reversal of 9789138 is 8319879.

It can be written as a sum of positive squares in only one way, i.e., 8803089 + 986049 = 2967^2 + 993^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9789093 and 9789102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9789133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 271903 + ... + 271938.

Almost surely, 2^9789138 is an apocalyptic number.

9789138 is an abundant number, since it is smaller than the sum of its proper divisors (11420700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9789138 is a wasteful number, since it uses less digits than its factorization.

9789138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543849 (or 543846 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 9789138 is about 3128.7598182027. The cubic root of 9789138 is about 213.9184042725.

The spelling of 9789138 in words is "nine million, seven hundred eighty-nine thousand, one hundred thirty-eight".