9940005 has 12 divisors (see below), whose sum is σ = 17229420. Its totient is φ = 5301312.

The previous prime is 9940003. The next prime is 9940027. The reversal of 9940005 is 5000499.

It is a happy number.

9940005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1454436 + 8485569 = 1206^2 + 2913^2 .

It is not a de Polignac number, because 9940005 - 2¹ = 9940003 is a prime.

It is a Curzon number.

9940005 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110400 + ... + 110489.

It is an arithmetic number, because the mean of its divisors is an integer number (1435785).

Almost surely, 2^9940005 is an apocalyptic number.

It is an amenable number.

9940005 is a deficient number, since it is larger than the sum of its proper divisors (7289415).

9940005 is a wasteful number, since it uses less digits than its factorization.

9940005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220900 (or 220897 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 9940005 is about 3152.7773470386. Note that the first 3 decimals coincide. The cubic root of 9940005 is about 215.0117534588.

It can be divided in two parts, 99 and 40005, that added together give a palindrome (40104).

The spelling of 9940005 in words is "nine million, nine hundred forty thousand, five".