12716639 has 4 divisors (see below), whose sum is σ = 13694856. Its totient is φ = 11738424.

The previous prime is 12716633. The next prime is 12716651. The reversal of 12716639 is 93661721.

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 12716639 - 2¹² = 12712543 is a prime.

It is a super-3 number, since 3×12716639³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12716599 and 12716608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12716633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489089 + ... + 489114.

It is an arithmetic number, because the mean of its divisors is an integer number (3423714).

Almost surely, 2^12716639 is an apocalyptic number.

12716639 is a deficient number, since it is larger than the sum of its proper divisors (978217).

12716639 is an equidigital number, since it uses as much as digits as its factorization.

12716639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978216.

The product of its digits is 13608, while the sum is 35.

The square root of 12716639 is about 3566.0396800933. The cubic root of 12716639 is about 233.4125021603.

The spelling of 12716639 in words is "twelve million, seven hundred sixteen thousand, six hundred thirty-nine".