13986749 has 4 divisors (see below), whose sum is σ = 15984864. Its totient is φ = 11988636.

The previous prime is 13986743. The next prime is 13986761. The reversal of 13986749 is 94768931.

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: 94768931 = 17 ⋅5574643.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13986749 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 (13986743) 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, 999047 + ... + 999060.

It is an arithmetic number, because the mean of its divisors is an integer number (3996216).

Almost surely, 2^13986749 is an apocalyptic number.

It is an amenable number.

13986749 is a deficient number, since it is larger than the sum of its proper divisors (1998115).

13986749 is an equidigital number, since it uses as much as digits as its factorization.

13986749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998114.

The product of its digits is 326592, while the sum is 47.

The square root of 13986749 is about 3739.8862282160. The cubic root of 13986749 is about 240.9381624258.

The spelling of 13986749 in words is "thirteen million, nine hundred eighty-six thousand, seven hundred forty-nine".