13966649 has 4 divisors (see below), whose sum is σ = 14344164. Its totient is φ = 13589136.

The previous prime is 13966643. The next prime is 13966651. The reversal of 13966649 is 94666931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94666931 = 17 ⋅5568643.

It can be written as a sum of positive squares in 2 ways, for example, as 9966649 + 4000000 = 3157^2 + 2000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13966649 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 (13966643) 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 3 ways as a sum of consecutive naturals, for example, 188702 + ... + 188775.

It is an arithmetic number, because the mean of its divisors is an integer number (3586041).

Almost surely, 2^13966649 is an apocalyptic number.

It is an amenable number.

13966649 is a deficient number, since it is larger than the sum of its proper divisors (377515).

13966649 is an equidigital number, since it uses as much as digits as its factorization.

13966649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377514.

The product of its digits is 209952, while the sum is 44.

The square root of 13966649 is about 3737.1980145558. The cubic root of 13966649 is about 240.8226917336.

The spelling of 13966649 in words is "thirteen million, nine hundred sixty-six thousand, six hundred forty-nine".