9940013 has 8 divisors (see below), whose sum is σ = 10261368. Its totient is φ = 9621504.

The previous prime is 9940003. The next prime is 9940027. The reversal of 9940013 is 3100499.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3319684 + 6620329 = 1822^2 + 2573^2 .

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 9940013 - 2⁶ = 9939949 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 (9940003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8045 + ... + 9197.

It is an arithmetic number, because the mean of its divisors is an integer number (1282671).

Almost surely, 2^9940013 is an apocalyptic number.

It is an amenable number.

9940013 is a deficient number, since it is larger than the sum of its proper divisors (321355).

9940013 is a wasteful number, since it uses less digits than its factorization.

9940013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 9940013 is about 3152.7786157610. The cubic root of 9940013 is about 215.0118111413.

The spelling of 9940013 in words is "nine million, nine hundred forty thousand, thirteen".