13297749 has 12 divisors (see below), whose sum is σ = 18543456. Its totient is φ = 8460408.

The previous prime is 13297741. The next prime is 13297759. The reversal of 13297749 is 94779231.

13297749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13297749 - 2³ = 13297741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13297749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13297741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30072 + ... + 30510.

It is an arithmetic number, because the mean of its divisors is an integer number (1545288).

Almost surely, 2^13297749 is an apocalyptic number.

It is an amenable number.

13297749 is a deficient number, since it is larger than the sum of its proper divisors (5245707).

13297749 is an frugal number, since it uses more digits than its factorization.

13297749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 465 counting only the distinct ones).

The product of its digits is 95256, while the sum is 42.

The square root of 13297749 is about 3646.6078758210. The cubic root of 13297749 is about 236.9150828966.

The spelling of 13297749 in words is "thirteen million, two hundred ninety-seven thousand, seven hundred forty-nine".