320040013 has 16 divisors (see below), whose sum is σ = 336600000. Its totient is φ = 304012800.

The previous prime is 320039999. The next prime is 320040029. The reversal of 320040013 is 310040023.

It is a cyclic number.

It is not a de Polignac number, because 320040013 - 2²¹ = 317942861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320039975 and 320040002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320010013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255613 + ... + 256861.

It is an arithmetic number, because the mean of its divisors is an integer number (21037500).

Almost surely, 2^320040013 is an apocalyptic number.

It is an amenable number.

320040013 is a deficient number, since it is larger than the sum of its proper divisors (16559987).

320040013 is a wasteful number, since it uses less digits than its factorization.

320040013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 320040013 is about 17889.6621823890. The cubic root of 320040013 is about 684.0188863440.

Adding to 320040013 its reverse (310040023), we get a palindrome (630080036).

The spelling of 320040013 in words is "three hundred twenty million, forty thousand, thirteen".