13722013 has 4 divisors (see below), whose sum is σ = 13794048. Its totient is φ = 13649980.

The previous prime is 13721993. The next prime is 13722019. The reversal of 13722013 is 31022731.

13722013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31022731 = 59 ⋅525809.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13722013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13722019) 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, 35731 + ... + 36112.

It is an arithmetic number, because the mean of its divisors is an integer number (3448512).

Almost surely, 2^13722013 is an apocalyptic number.

It is an amenable number.

13722013 is a deficient number, since it is larger than the sum of its proper divisors (72035).

13722013 is an equidigital number, since it uses as much as digits as its factorization.

13722013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72034.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 13722013 is about 3704.3235549827. The cubic root of 13722013 is about 239.4083400628.

Adding to 13722013 its reverse (31022731), we get a palindrome (44744744).

The spelling of 13722013 in words is "thirteen million, seven hundred twenty-two thousand, thirteen".