12787613 has 8 divisors (see below), whose sum is σ = 13316856. Its totient is φ = 12268800.

The previous prime is 12787573. The next prime is 12787633. The reversal of 12787613 is 31678721.

It can be written as a sum of positive squares in 4 ways, for example, as 3319684 + 9467929 = 1822^2 + 3077^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12787613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12787633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56 + ... + 5057.

It is an arithmetic number, because the mean of its divisors is an integer number (1664607).

Almost surely, 2^12787613 is an apocalyptic number.

It is an amenable number.

12787613 is a deficient number, since it is larger than the sum of its proper divisors (529243).

12787613 is an equidigital number, since it uses as much as digits as its factorization.

12787613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215.

The product of its digits is 14112, while the sum is 35.

The square root of 12787613 is about 3575.9772090996. The cubic root of 12787613 is about 233.8459367701.

The spelling of 12787613 in words is "twelve million, seven hundred eighty-seven thousand, six hundred thirteen".