13040723 has 4 divisors (see below), whose sum is σ = 13053768. Its totient is φ = 13027680.

The previous prime is 13040693. The next prime is 13040743. The reversal of 13040723 is 32704031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13040723 - 2⁶ = 13040659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13040695 and 13040704.

It is not an unprimeable number, because it can be changed into a prime (13040743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4886 + ... + 7067.

It is an arithmetic number, because the mean of its divisors is an integer number (3263442).

Almost surely, 2^13040723 is an apocalyptic number.

13040723 is a deficient number, since it is larger than the sum of its proper divisors (13045).

13040723 is a wasteful number, since it uses less digits than its factorization.

13040723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13044.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 13040723 is about 3611.1941238322. The cubic root of 13040723 is about 235.3787343936.

Adding to 13040723 its reverse (32704031), we get a palindrome (45744754).

The spelling of 13040723 in words is "thirteen million, forty thousand, seven hundred twenty-three".