9489749 has 4 divisors (see below), whose sum is σ = 9498336. Its totient is φ = 9481164.

The previous prime is 9489719. The next prime is 9489763. The reversal of 9489749 is 9479849.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9479849 = 71 ⋅133519.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9489749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9489697 and 9489706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9489719) by changing a digit.

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, 2339 + ... + 4944.

It is an arithmetic number, because the mean of its divisors is an integer number (2374584).

Almost surely, 2^9489749 is an apocalyptic number.

It is an amenable number.

9489749 is a deficient number, since it is larger than the sum of its proper divisors (8587).

9489749 is a wasteful number, since it uses less digits than its factorization.

9489749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8586.

The product of its digits is 653184, while the sum is 50.

The square root of 9489749 is about 3080.5436208566. The cubic root of 9489749 is about 211.7149738532.

The spelling of 9489749 in words is "nine million, four hundred eighty-nine thousand, seven hundred forty-nine".