12969649 has 16 divisors (see below), whose sum is σ = 16248960. Its totient is φ = 10056960.

The previous prime is 12969611. The next prime is 12969661. The reversal of 12969649 is 94696921.

It is a cyclic number.

It is not a de Polignac number, because 12969649 - 2⁹ = 12969137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12969599 and 12969608.

It is not an unprimeable number, because it can be changed into a prime (12969679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29737 + ... + 30169.

It is an arithmetic number, because the mean of its divisors is an integer number (1015560).

Almost surely, 2^12969649 is an apocalyptic number.

It is an amenable number.

12969649 is a deficient number, since it is larger than the sum of its proper divisors (3279311).

12969649 is a wasteful number, since it uses less digits than its factorization.

12969649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840.

The product of its digits is 209952, while the sum is 46.

The square root of 12969649 is about 3601.3398895411. The cubic root of 12969649 is about 234.9503380798.

The spelling of 12969649 in words is "twelve million, nine hundred sixty-nine thousand, six hundred forty-nine".