12649609 has 8 divisors (see below), whose sum is σ = 15085440. Its totient is φ = 10370976.

The previous prime is 12649601. The next prime is 12649613. The reversal of 12649609 is 90694621.

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

It is not a de Polignac number, because 12649609 - 2³ = 12649601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12649601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39124 + ... + 39445.

It is an arithmetic number, because the mean of its divisors is an integer number (1885680).

Almost surely, 2^12649609 is an apocalyptic number.

It is an amenable number.

12649609 is a deficient number, since it is larger than the sum of its proper divisors (2435831).

12649609 is an equidigital number, since it uses as much as digits as its factorization.

12649609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78599.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 12649609 is about 3556.6288813988. The cubic root of 12649609 is about 233.0016700624.

The spelling of 12649609 in words is "twelve million, six hundred forty-nine thousand, six hundred nine".