9940749 has 24 divisors (see below), whose sum is σ = 16408512. Its totient is φ = 5241600.

The previous prime is 9940747. The next prime is 9940751. The reversal of 9940749 is 9470499.

It is an interprime number because it is at equal distance from previous prime (9940747) and next prime (9940751).

It is not a de Polignac number, because 9940749 - 2¹ = 9940747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9940749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2149 + ... + 4949.

It is an arithmetic number, because the mean of its divisors is an integer number (683688).

Almost surely, 2^9940749 is an apocalyptic number.

It is an amenable number.

9940749 is a deficient number, since it is larger than the sum of its proper divisors (6467763).

9940749 is a wasteful number, since it uses less digits than its factorization.

9940749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837 (or 2824 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 9940749 is about 3152.8953360364. The cubic root of 9940749 is about 215.0171178006.

The spelling of 9940749 in words is "nine million, nine hundred forty thousand, seven hundred forty-nine".