13444649 has 4 divisors (see below), whose sum is σ = 13452036. Its totient is φ = 13437264.

The previous prime is 13444643. The next prime is 13444663. The reversal of 13444649 is 94644431.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12250000 + 1194649 = 3500^2 + 1093^2 .

It is a cyclic number.

It is not a de Polignac number, because 13444649 - 2⁴ = 13444633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13444643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187 + ... + 5319.

It is an arithmetic number, because the mean of its divisors is an integer number (3363009).

Almost surely, 2^13444649 is an apocalyptic number.

It is an amenable number.

13444649 is a deficient number, since it is larger than the sum of its proper divisors (7387).

13444649 is an equidigital number, since it uses as much as digits as its factorization.

13444649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7386.

The product of its digits is 41472, while the sum is 35.

The square root of 13444649 is about 3666.6945605000. The cubic root of 13444649 is about 237.7842889315.

The spelling of 13444649 in words is "thirteen million, four hundred forty-four thousand, six hundred forty-nine".