13347749 has 4 divisors (see below), whose sum is σ = 13358400. Its totient is φ = 13337100.

The previous prime is 13347739. The next prime is 13347767. The reversal of 13347749 is 94774331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94774331 = 223 ⋅424997.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13347749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13347739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3149 + ... + 6050.

It is an arithmetic number, because the mean of its divisors is an integer number (3339600).

Almost surely, 2^13347749 is an apocalyptic number.

It is an amenable number.

13347749 is a deficient number, since it is larger than the sum of its proper divisors (10651).

13347749 is an equidigital number, since it uses as much as digits as its factorization.

13347749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10650.

The product of its digits is 63504, while the sum is 38.

The square root of 13347749 is about 3653.4571298977. The cubic root of 13347749 is about 237.2116478331.

The spelling of 13347749 in words is "thirteen million, three hundred forty-seven thousand, seven hundred forty-nine".