13721707 has 4 divisors (see below), whose sum is σ = 13779360. Its totient is φ = 13664056.

The previous prime is 13721693. The next prime is 13721713. The reversal of 13721707 is 70712731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70712731 = 911 ⋅77621.

It is a cyclic number.

It is not a de Polignac number, because 13721707 - 2¹¹ = 13719659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13761707) 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 3 ways as a sum of consecutive naturals, for example, 28468 + ... + 28945.

It is an arithmetic number, because the mean of its divisors is an integer number (3444840).

Almost surely, 2^13721707 is an apocalyptic number.

13721707 is a deficient number, since it is larger than the sum of its proper divisors (57653).

13721707 is an equidigital number, since it uses as much as digits as its factorization.

13721707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57652.

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 13721707 is about 3704.2822516650. The cubic root of 13721707 is about 239.4065604527.

The spelling of 13721707 in words is "thirteen million, seven hundred twenty-one thousand, seven hundred seven".