13721323 has 12 divisors (see below), whose sum is σ = 17413272. Its totient is φ = 10691520.

The previous prime is 13721303. The next prime is 13721327. The reversal of 13721323 is 32312731.

It is a happy number.

It is not a de Polignac number, because 13721323 - 2⁵ = 13721291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13721294 and 13721303.

It is not an unprimeable number, because it can be changed into a prime (13721327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12190 + ... + 13267.

It is an arithmetic number, because the mean of its divisors is an integer number (1451106).

Almost surely, 2^13721323 is an apocalyptic number.

13721323 is a deficient number, since it is larger than the sum of its proper divisors (3691949).

13721323 is a wasteful number, since it uses less digits than its factorization.

13721323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25482 (or 25475 counting only the distinct ones).

The product of its digits is 756, while the sum is 22.

The square root of 13721323 is about 3704.2304193989. The cubic root of 13721323 is about 239.4043271792.

The spelling of 13721323 in words is "thirteen million, seven hundred twenty-one thousand, three hundred twenty-three".