3720313321 has 2 divisors, whose sum is σ = 3720313322. Its totient is φ = 3720313320.

The previous prime is 3720313307. The next prime is 3720313339. The reversal of 3720313321 is 1233130273.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2739370921 + 980942400 = 52339^2 + 31320^2 .

It is an emirp because it is prime and its reverse (1233130273) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3720313321 - 2¹³ = 3720305129 is a prime.

It is not a weakly prime, because it can be changed into another prime (3720313021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860156660 + 1860156661.

It is an arithmetic number, because the mean of its divisors is an integer number (1860156661).

Almost surely, 2^3720313321 is an apocalyptic number.

It is an amenable number.

3720313321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3720313321 is an equidigital number, since it uses as much as digits as its factorization.

3720313321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 3720313321 is about 60994.3712239089. The cubic root of 3720313321 is about 1549.5056794839.

Adding to 3720313321 its reverse (1233130273), we get a palindrome (4953443594).

The spelling of 3720313321 in words is "three billion, seven hundred twenty million, three hundred thirteen thousand, three hundred twenty-one".