13683749 has 4 divisors (see below), whose sum is σ = 13700064. Its totient is φ = 13667436.

The previous prime is 13683731. The next prime is 13683757. The reversal of 13683749 is 94738631.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13683749 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 (13683799) 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, 6827 + ... + 8600.

It is an arithmetic number, because the mean of its divisors is an integer number (3425016).

Almost surely, 2^13683749 is an apocalyptic number.

It is an amenable number.

13683749 is a deficient number, since it is larger than the sum of its proper divisors (16315).

13683749 is an equidigital number, since it uses as much as digits as its factorization.

13683749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16314.

The product of its digits is 108864, while the sum is 41.

The square root of 13683749 is about 3699.1551738201. The cubic root of 13683749 is about 239.1856018764.

The spelling of 13683749 in words is "thirteen million, six hundred eighty-three thousand, seven hundred forty-nine".