13727731 has 6 divisors (see below), whose sum is σ = 13880220. Its totient is φ = 13576896.

The previous prime is 13727729. The next prime is 13727767. The reversal of 13727731 is 13772731.

It is not a de Polignac number, because 13727731 - 2¹ = 13727729 is a prime.

It is a super-2 number, since 2×13727731² = 376901196816722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13727693 and 13727702.

It is not an unprimeable number, because it can be changed into a prime (13727771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8680 + ... + 10138.

It is an arithmetic number, because the mean of its divisors is an integer number (2313370).

Almost surely, 2^13727731 is an apocalyptic number.

13727731 is a deficient number, since it is larger than the sum of its proper divisors (152489).

13727731 is an frugal number, since it uses more digits than its factorization.

13727731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653 (or 1556 counting only the distinct ones).

The product of its digits is 6174, while the sum is 31.

The square root of 13727731 is about 3705.0952754282. The cubic root of 13727731 is about 239.4415894795.

The spelling of 13727731 in words is "thirteen million, seven hundred twenty-seven thousand, seven hundred thirty-one".