13540013 has 4 divisors (see below), whose sum is σ = 14006940. Its totient is φ = 13073088.

The previous prime is 13540001. The next prime is 13540073. The reversal of 13540013 is 31004531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31004531 = 61 ⋅508271.

It can be written as a sum of positive squares in 2 ways, for example, as 10843849 + 2696164 = 3293^2 + 1642^2 .

It is a cyclic number.

It is not a de Polignac number, because 13540013 - 2⁴ = 13539997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13539973 and 13540000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13540073) 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, 233420 + ... + 233477.

It is an arithmetic number, because the mean of its divisors is an integer number (3501735).

Almost surely, 2^13540013 is an apocalyptic number.

It is an amenable number.

13540013 is a deficient number, since it is larger than the sum of its proper divisors (466927).

13540013 is an equidigital number, since it uses as much as digits as its factorization.

13540013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466926.

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

The square root of 13540013 is about 3679.6756650553. The cubic root of 13540013 is about 238.3451727156.

Adding to 13540013 its reverse (31004531), we get a palindrome (44544544).

The spelling of 13540013 in words is "thirteen million, five hundred forty thousand, thirteen".