9749749 has 4 divisors (see below), whose sum is σ = 9756000. Its totient is φ = 9743500.

The previous prime is 9749743. The next prime is 9749801. The reversal of 9749749 is 9479479.

9749749 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 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.

It is a cyclic number.

It is not a de Polignac number, because 9749749 - 2³ = 9749741 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9749741) 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, 1374 + ... + 4624.

It is an arithmetic number, because the mean of its divisors is an integer number (2439000).

Almost surely, 2^9749749 is an apocalyptic number.

It is an amenable number.

9749749 is a deficient number, since it is larger than the sum of its proper divisors (6251).

9749749 is a wasteful number, since it uses less digits than its factorization.

9749749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6250.

The product of its digits is 571536, while the sum is 49.

The square root of 9749749 is about 3122.4588067739. The cubic root of 9749749 is about 213.6311008430.

The spelling of 9749749 in words is "nine million, seven hundred forty-nine thousand, seven hundred forty-nine".