12613649 has 4 divisors (see below), whose sum is σ = 12628464. Its totient is φ = 12598836.

The previous prime is 12613639. The next prime is 12613661. The reversal of 12613649 is 94631621.

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: 94631621 = 7 ⋅13518803.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12613649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12613619) 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, 6047 + ... + 7860.

It is an arithmetic number, because the mean of its divisors is an integer number (3157116).

Almost surely, 2^12613649 is an apocalyptic number.

It is an amenable number.

12613649 is a deficient number, since it is larger than the sum of its proper divisors (14815).

12613649 is an equidigital number, since it uses as much as digits as its factorization.

12613649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14814.

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

The square root of 12613649 is about 3551.5699345501. The cubic root of 12613649 is about 232.7806700235.

The spelling of 12613649 in words is "twelve million, six hundred thirteen thousand, six hundred forty-nine".