13315749 has 4 divisors (see below), whose sum is σ = 17754336. Its totient is φ = 8877164.

The previous prime is 13315741. The next prime is 13315787. The reversal of 13315749 is 94751331.

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 an emirpimes, since its reverse is a distinct semiprime: 94751331 = 3 ⋅31583777.

It is a cyclic number.

It is not a de Polignac number, because 13315749 - 2³ = 13315741 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13315741) 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, 2219289 + ... + 2219294.

It is an arithmetic number, because the mean of its divisors is an integer number (4438584).

Almost surely, 2^13315749 is an apocalyptic number.

It is an amenable number.

13315749 is a deficient number, since it is larger than the sum of its proper divisors (4438587).

13315749 is an equidigital number, since it uses as much as digits as its factorization.

13315749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4438586.

The product of its digits is 11340, while the sum is 33.

The square root of 13315749 is about 3649.0750882929. The cubic root of 13315749 is about 237.0219317773.

The spelling of 13315749 in words is "thirteen million, three hundred fifteen thousand, seven hundred forty-nine".