13127657 has 4 divisors (see below), whose sum is σ = 13144656. Its totient is φ = 13110660.

The previous prime is 13127603. The next prime is 13127669. The reversal of 13127657 is 75672131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13127657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13127057) 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, 7283 + ... + 8904.

It is an arithmetic number, because the mean of its divisors is an integer number (3286164).

Almost surely, 2^13127657 is an apocalyptic number.

It is an amenable number.

13127657 is a deficient number, since it is larger than the sum of its proper divisors (16999).

13127657 is an equidigital number, since it uses as much as digits as its factorization.

13127657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16998.

The product of its digits is 8820, while the sum is 32.

The square root of 13127657 is about 3623.2108688289. The cubic root of 13127657 is about 235.9006152916.

Adding to 13127657 its reverse (75672131), we get a palindrome (88799788).

The spelling of 13127657 in words is "thirteen million, one hundred twenty-seven thousand, six hundred fifty-seven".