9139747 has 4 divisors (see below), whose sum is σ = 9255520. Its totient is φ = 9023976.

The previous prime is 9139723. The next prime is 9139751. The reversal of 9139747 is 7479319.

9139747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7479319 = 1627 ⋅4597.

It is a cyclic number.

It is not a de Polignac number, because 9139747 - 2¹¹ = 9137699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9139787) 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, 57768 + ... + 57925.

It is an arithmetic number, because the mean of its divisors is an integer number (2313880).

Almost surely, 2^9139747 is an apocalyptic number.

9139747 is a deficient number, since it is larger than the sum of its proper divisors (115773).

9139747 is a wasteful number, since it uses less digits than its factorization.

9139747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115772.

The product of its digits is 47628, while the sum is 40.

The square root of 9139747 is about 3023.2014487956. The cubic root of 9139747 is about 209.0794704002.

The spelling of 9139747 in words is "nine million, one hundred thirty-nine thousand, seven hundred forty-seven".