9940649 has 8 divisors (see below), whose sum is σ = 10416000. Its totient is φ = 9474192.

The previous prime is 9940643. The next prime is 9940681. The reversal of 9940649 is 9460499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9940649 - 2²⁰ = 8892073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9940643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122 + ... + 4460.

It is an arithmetic number, because the mean of its divisors is an integer number (1302000).

Almost surely, 2^9940649 is an apocalyptic number.

It is an amenable number.

9940649 is a deficient number, since it is larger than the sum of its proper divisors (475351).

9940649 is a wasteful number, since it uses less digits than its factorization.

9940649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4447.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 9940649 is about 3152.8794775570. The cubic root of 9940649 is about 215.0163968025.

The spelling of 9940649 in words is "nine million, nine hundred forty thousand, six hundred forty-nine".