3720160321 has 4 divisors (see below), whose sum is σ = 3720291012. Its totient is φ = 3720029632.

The previous prime is 3720160307. The next prime is 3720160333. The reversal of 3720160321 is 1230610273.

3720160321 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 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 1186044721 + 2534115600 = 34439^2 + 50340^2 .

It is a cyclic number.

It is not a de Polignac number, because 3720160321 - 2⁹ = 3720159809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3720160361) 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, 2500 + ... + 86293.

It is an arithmetic number, because the mean of its divisors is an integer number (930072753).

Almost surely, 2^3720160321 is an apocalyptic number.

It is an amenable number.

3720160321 is a deficient number, since it is larger than the sum of its proper divisors (130691).

3720160321 is an equidigital number, since it uses as much as digits as its factorization.

3720160321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130690.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 3720160321 is about 60993.1169969202. The cubic root of 3720160321 is about 1549.4844377588.

Adding to 3720160321 its reverse (1230610273), we get a palindrome (4950770594).

The spelling of 3720160321 in words is "three billion, seven hundred twenty million, one hundred sixty thousand, three hundred twenty-one".