13927731 has 8 divisors (see below), whose sum is σ = 18591744. Its totient is φ = 9274440.

The previous prime is 13927723. The next prime is 13927751. The reversal of 13927731 is 13772931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13927731 - 2³ = 13927723 is a prime.

It is a super-2 number, since 2×13927731² = 387963381616722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 13927692 and 13927701.

It is not an unprimeable number, because it can be changed into a prime (13927721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1126 + ... + 5396.

It is an arithmetic number, because the mean of its divisors is an integer number (2323968).

Almost surely, 2^13927731 is an apocalyptic number.

13927731 is a deficient number, since it is larger than the sum of its proper divisors (4664013).

13927731 is a wasteful number, since it uses less digits than its factorization.

13927731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361.

The product of its digits is 7938, while the sum is 33.

The square root of 13927731 is about 3731.9875401721. The cubic root of 13927731 is about 240.5987998909.

The spelling of 13927731 in words is "thirteen million, nine hundred twenty-seven thousand, seven hundred thirty-one".