13380749 has 2 divisors, whose sum is σ = 13380750. Its totient is φ = 13380748.

The previous prime is 13380743. The next prime is 13380761. The reversal of 13380749 is 94708331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9259849 + 4120900 = 3043^2 + 2030^2 .

It is a cyclic number.

It is not a de Polignac number, because 13380749 - 2¹² = 13376653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13380743) 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 as a sum of consecutive naturals, namely, 6690374 + 6690375.

It is an arithmetic number, because the mean of its divisors is an integer number (6690375).

Almost surely, 2^13380749 is an apocalyptic number.

It is an amenable number.

13380749 is a deficient number, since it is larger than the sum of its proper divisors (1).

13380749 is an equidigital number, since it uses as much as digits as its factorization.

13380749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13380749 is about 3657.9706122384. The cubic root of 13380749 is about 237.4069752028.

The spelling of 13380749 in words is "thirteen million, three hundred eighty thousand, seven hundred forty-nine".