12316649 has 4 divisors (see below), whose sum is σ = 12328260. Its totient is φ = 12305040.

The previous prime is 12316643. The next prime is 12316691. The reversal of 12316649 is 94661321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11854249 + 462400 = 3443^2 + 680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12316649 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12316643) 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, 4034 + ... + 6395.

It is an arithmetic number, because the mean of its divisors is an integer number (3082065).

Almost surely, 2^12316649 is an apocalyptic number.

It is an amenable number.

12316649 is a deficient number, since it is larger than the sum of its proper divisors (11611).

12316649 is a wasteful number, since it uses less digits than its factorization.

12316649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11610.

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

The square root of 12316649 is about 3509.5083701282. The cubic root of 12316649 is about 230.9391280297.

The spelling of 12316649 in words is "twelve million, three hundred sixteen thousand, six hundred forty-nine".