13720373 has 4 divisors (see below), whose sum is σ = 13728588. Its totient is φ = 13712160.

The previous prime is 13720361. The next prime is 13720379. The reversal of 13720373 is 37302731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8254129 + 5466244 = 2873^2 + 2338^2 .

It is a cyclic number.

It is not a de Polignac number, because 13720373 - 2¹⁸ = 13458229 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 (13720379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608 + ... + 5273.

It is an arithmetic number, because the mean of its divisors is an integer number (3432147).

Almost surely, 2^13720373 is an apocalyptic number.

It is an amenable number.

13720373 is a deficient number, since it is larger than the sum of its proper divisors (8215).

13720373 is an equidigital number, since it uses as much as digits as its factorization.

13720373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8214.

The product of its (nonzero) digits is 2646, while the sum is 26.

The square root of 13720373 is about 3704.1021854155. The cubic root of 13720373 is about 239.3988019744.

The spelling of 13720373 in words is "thirteen million, seven hundred twenty thousand, three hundred seventy-three".