13731663 has 16 divisors (see below), whose sum is σ = 20439936. Its totient is φ = 8127840.

The previous prime is 13731659. The next prime is 13731673. The reversal of 13731663 is 36613731.

It is not a de Polignac number, because 13731663 - 2² = 13731659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13731663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13731673) 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 15 ways as a sum of consecutive naturals, for example, 3420 + ... + 6257.

It is an arithmetic number, because the mean of its divisors is an integer number (1277496).

Almost surely, 2^13731663 is an apocalyptic number.

13731663 is a deficient number, since it is larger than the sum of its proper divisors (6708273).

13731663 is a wasteful number, since it uses less digits than its factorization.

13731663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9734.

The product of its digits is 6804, while the sum is 30.

The square root of 13731663 is about 3705.6258580704. The cubic root of 13731663 is about 239.4644481844.

The spelling of 13731663 in words is "thirteen million, seven hundred thirty-one thousand, six hundred sixty-three".