9138785 has 4 divisors (see below), whose sum is σ = 10966548. Its totient is φ = 7311024.

The previous prime is 9138757. The next prime is 9138803. The reversal of 9138785 is 5878319.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5878319 = 709 ⋅8291.

It can be written as a sum of positive squares in 2 ways, for example, as 3243601 + 5895184 = 1801^2 + 2428^2 .

It is a cyclic number.

It is not a de Polignac number, because 9138785 - 2⁶ = 9138721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913874 + ... + 913883.

It is an arithmetic number, because the mean of its divisors is an integer number (2741637).

Almost surely, 2^9138785 is an apocalyptic number.

It is an amenable number.

9138785 is a deficient number, since it is larger than the sum of its proper divisors (1827763).

9138785 is a wasteful number, since it uses less digits than its factorization.

9138785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827762.

The product of its digits is 60480, while the sum is 41.

The square root of 9138785 is about 3023.0423417478. The cubic root of 9138785 is about 209.0721346206.

The spelling of 9138785 in words is "nine million, one hundred thirty-eight thousand, seven hundred eighty-five".