13721684 has 12 divisors (see below), whose sum is σ = 24042900. Its totient is φ = 6852288.

The previous prime is 13721681. The next prime is 13721693. The reversal of 13721684 is 48612731.

It can be written as a sum of positive squares in 2 ways, for example, as 7075600 + 6646084 = 2660^2 + 2578^2 .

It is a super-2 number, since 2×13721684² = 376569223591712, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13721684.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13721681) 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, 2672 + ... + 5880.

It is an arithmetic number, because the mean of its divisors is an integer number (2003575).

Almost surely, 2^13721684 is an apocalyptic number.

It is an amenable number.

13721684 is a deficient number, since it is larger than the sum of its proper divisors (10321216).

13721684 is a wasteful number, since it uses less digits than its factorization.

13721684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282 (or 4280 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 13721684 is about 3704.2791471486. The cubic root of 13721684 is about 239.4064266901.

The spelling of 13721684 in words is "thirteen million, seven hundred twenty-one thousand, six hundred eighty-four".