12988013 has 4 divisors (see below), whose sum is σ = 13054140. Its totient is φ = 12921888.

The previous prime is 12988007. The next prime is 12988033. The reversal of 12988013 is 31088921.

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 9351364 + 3636649 = 3058^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 12988013 - 2²⁰ = 11939437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12988033) 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, 32768 + ... + 33161.

It is an arithmetic number, because the mean of its divisors is an integer number (3263535).

Almost surely, 2^12988013 is an apocalyptic number.

It is an amenable number.

12988013 is a deficient number, since it is larger than the sum of its proper divisors (66127).

12988013 is an equidigital number, since it uses as much as digits as its factorization.

12988013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66126.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 12988013 is about 3603.8885942826. Note that the first 3 decimals coincide. The cubic root of 12988013 is about 235.0611761659.

The spelling of 12988013 in words is "twelve million, nine hundred eighty-eight thousand, thirteen".