12662609 has 4 divisors (see below), whose sum is σ = 12719616. Its totient is φ = 12605604.

The previous prime is 12662567. The next prime is 12662623. The reversal of 12662609 is 90626621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90626621 = 83 ⋅1091887.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12662609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12662659) 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, 28169 + ... + 28614.

It is an arithmetic number, because the mean of its divisors is an integer number (3179904).

Almost surely, 2^12662609 is an apocalyptic number.

It is an amenable number.

12662609 is a deficient number, since it is larger than the sum of its proper divisors (57007).

12662609 is an equidigital number, since it uses as much as digits as its factorization.

12662609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57006.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 12662609 is about 3558.4559853959. The cubic root of 12662609 is about 233.0814613208.

The spelling of 12662609 in words is "twelve million, six hundred sixty-two thousand, six hundred nine".