13646749 has 2 divisors, whose sum is σ = 13646750. Its totient is φ = 13646748.

The previous prime is 13646741. The next prime is 13646771. The reversal of 13646749 is 94764631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11222500 + 2424249 = 3350^2 + 1557^2 .

It is a cyclic number.

It is not a de Polignac number, because 13646749 - 2³ = 13646741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13646741) 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 as a sum of consecutive naturals, namely, 6823374 + 6823375.

It is an arithmetic number, because the mean of its divisors is an integer number (6823375).

Almost surely, 2^13646749 is an apocalyptic number.

It is an amenable number.

13646749 is a deficient number, since it is larger than the sum of its proper divisors (1).

13646749 is an equidigital number, since it uses as much as digits as its factorization.

13646749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 13646749 is about 3694.1506466304. The cubic root of 13646749 is about 238.9698263174.

The spelling of 13646749 in words is "thirteen million, six hundred forty-six thousand, seven hundred forty-nine".