12643797 has 16 divisors (see below), whose sum is σ = 18360000. Its totient is φ = 7709184.

The previous prime is 12643793. The next prime is 12643811. The reversal of 12643797 is 79734621.

It is not a de Polignac number, because 12643797 - 2² = 12643793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643793) 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, 2172 + ... + 5477.

It is an arithmetic number, because the mean of its divisors is an integer number (1147500).

Almost surely, 2^12643797 is an apocalyptic number.

It is an amenable number.

12643797 is a deficient number, since it is larger than the sum of its proper divisors (5716203).

12643797 is a wasteful number, since it uses less digits than its factorization.

12643797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7700.

The product of its digits is 63504, while the sum is 39.

The square root of 12643797 is about 3555.8117216748. The cubic root of 12643797 is about 232.9659795479.

The spelling of 12643797 in words is "twelve million, six hundred forty-three thousand, seven hundred ninety-seven".