12838649 has 2 divisors, whose sum is σ = 12838650. Its totient is φ = 12838648.

The previous prime is 12838643. The next prime is 12838691. The reversal of 12838649 is 94683821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 6285049 = 2560^2 + 2507^2 .

It is a cyclic number.

It is not a de Polignac number, because 12838649 - 2²⁰ = 11790073 is a prime.

It is not a weakly prime, because it can be changed into another prime (12838643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6419324 + 6419325.

It is an arithmetic number, because the mean of its divisors is an integer number (6419325).

Almost surely, 2^12838649 is an apocalyptic number.

It is an amenable number.

12838649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12838649 is an equidigital number, since it uses as much as digits as its factorization.

12838649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 12838649 is about 3583.1060548078. The cubic root of 12838649 is about 234.1566207421.

The spelling of 12838649 in words is "twelve million, eight hundred thirty-eight thousand, six hundred forty-nine".