12628687 has 4 divisors (see below), whose sum is σ = 13036096. Its totient is φ = 12221280.

The previous prime is 12628669. The next prime is 12628709. The reversal of 12628687 is 78682621.

12628687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78682621 = 397 ⋅198193.

It is a cyclic number.

It is not a de Polignac number, because 12628687 - 2¹⁹ = 12104399 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 (12628607) 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, 203658 + ... + 203719.

It is an arithmetic number, because the mean of its divisors is an integer number (3259024).

Almost surely, 2^12628687 is an apocalyptic number.

12628687 is a deficient number, since it is larger than the sum of its proper divisors (407409).

12628687 is an equidigital number, since it uses as much as digits as its factorization.

12628687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407408.

The product of its digits is 64512, while the sum is 40.

The square root of 12628687 is about 3553.6863958431. The cubic root of 12628687 is about 232.8731403708.

The spelling of 12628687 in words is "twelve million, six hundred twenty-eight thousand, six hundred eighty-seven".