13040513 has 4 divisors (see below), whose sum is σ = 13807620. Its totient is φ = 12273408.

The previous prime is 13040497. The next prime is 13040527. The reversal of 13040513 is 31504031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7246864 + 5793649 = 2692^2 + 2407^2 .

It is a cyclic number.

It is not a de Polignac number, because 13040513 - 2⁴ = 13040497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 767089 = 13040513 / (1 + 3 + 0 + 4 + 0 + 5 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13040491 and 13040500.

It is not an unprimeable number, because it can be changed into a prime (13040543) 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 3 ways as a sum of consecutive naturals, for example, 383528 + ... + 383561.

It is an arithmetic number, because the mean of its divisors is an integer number (3451905).

Almost surely, 2^13040513 is an apocalyptic number.

It is an amenable number.

13040513 is a deficient number, since it is larger than the sum of its proper divisors (767107).

13040513 is an equidigital number, since it uses as much as digits as its factorization.

13040513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767106.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 13040513 is about 3611.1650474604. The cubic root of 13040513 is about 235.3774709207.

Adding to 13040513 its reverse (31504031), we get a palindrome (44544544).

The spelling of 13040513 in words is "thirteen million, forty thousand, five hundred thirteen".