40000013 has 8 divisors (see below), whose sum is σ = 43086336. Its totient is φ = 37026000.

The previous prime is 40000003. The next prime is 40000021. The reversal of 40000013 is 31000004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40000013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27338 + ... + 28763.

It is an arithmetic number, because the mean of its divisors is an integer number (5385792).

Almost surely, 2^40000013 is an apocalyptic number.

It is an amenable number.

40000013 is a deficient number, since it is larger than the sum of its proper divisors (3086323).

40000013 is a wasteful number, since it uses less digits than its factorization.

40000013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56155.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 40000013 is about 6324.5563480769. The cubic root of 40000013 is about 341.9952263848.

Adding to 40000013 its reverse (31000004), we get a palindrome (71000017).

Subtracting from 40000013 its reverse (31000004), we obtain a palindrome (9000009).

It can be divided in two parts, 4000001 and 3, that added together give a palindrome (4000004).

The spelling of 40000013 in words is "forty million, thirteen", and thus it is an aban number and an uban number.