12968513 has 4 divisors (see below), whose sum is σ = 13055700. Its totient is φ = 12881328.

The previous prime is 12968503. The next prime is 12968519. The reversal of 12968513 is 31586921.

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 976144 + 11992369 = 988^2 + 3463^2 .

It is a cyclic number.

It is not a de Polignac number, because 12968513 - 2²⁰ = 11919937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12968519) 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, 43370 + ... + 43667.

It is an arithmetic number, because the mean of its divisors is an integer number (3263925).

Almost surely, 2^12968513 is an apocalyptic number.

It is an amenable number.

12968513 is a deficient number, since it is larger than the sum of its proper divisors (87187).

12968513 is an equidigital number, since it uses as much as digits as its factorization.

12968513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87186.

The product of its digits is 12960, while the sum is 35.

The square root of 12968513 is about 3601.1821670113. The cubic root of 12968513 is about 234.9434781826.

The spelling of 12968513 in words is "twelve million, nine hundred sixty-eight thousand, five hundred thirteen".