9138643 has 4 divisors (see below), whose sum is σ = 9177120. Its totient is φ = 9100168.

The previous prime is 9138637. The next prime is 9138697. The reversal of 9138643 is 3468319.

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

It is a cyclic number.

It is not a de Polignac number, because 9138643 - 2⁹ = 9138131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9138599 and 9138608.

It is not an unprimeable number, because it can be changed into a prime (9138043) 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 3 ways as a sum of consecutive naturals, for example, 18880 + ... + 19357.

It is an arithmetic number, because the mean of its divisors is an integer number (2294280).

Almost surely, 2^9138643 is an apocalyptic number.

9138643 is a deficient number, since it is larger than the sum of its proper divisors (38477).

9138643 is a wasteful number, since it uses less digits than its factorization.

9138643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38476.

The product of its digits is 15552, while the sum is 34.

The square root of 9138643 is about 3023.0188553828. The cubic root of 9138643 is about 209.0710517489.

The spelling of 9138643 in words is "nine million, one hundred thirty-eight thousand, six hundred forty-three".