9138685 has 4 divisors (see below), whose sum is σ = 10966428. Its totient is φ = 7310944.

The previous prime is 9138637. The next prime is 9138697. The reversal of 9138685 is 5868319.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2595321 + 6543364 = 1611^2 + 2558^2 .

It is a cyclic number.

It is not a de Polignac number, because 9138685 - 2¹¹ = 9136637 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913864 + ... + 913873.

It is an arithmetic number, because the mean of its divisors is an integer number (2741607).

Almost surely, 2^9138685 is an apocalyptic number.

It is an amenable number.

9138685 is a deficient number, since it is larger than the sum of its proper divisors (1827743).

9138685 is a wasteful number, since it uses less digits than its factorization.

9138685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827742.

The product of its digits is 51840, while the sum is 40.

The square root of 9138685 is about 3023.0258020731. The cubic root of 9138685 is about 209.0713720360.

The spelling of 9138685 in words is "nine million, one hundred thirty-eight thousand, six hundred eighty-five".