3680321 has 2 divisors, whose sum is σ = 3680322. Its totient is φ = 3680320.

The previous prime is 3680291. The next prime is 3680363. The reversal of 3680321 is 1230863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2890000 + 790321 = 1700^2 + 889^2 .

It is an emirp because it is prime and its reverse (1230863) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3680321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3680371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840160 + 1840161.

It is an arithmetic number, because the mean of its divisors is an integer number (1840161).

Almost surely, 2^3680321 is an apocalyptic number.

It is an amenable number.

3680321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3680321 is an equidigital number, since it uses as much as digits as its factorization.

3680321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 3680321 is about 1918.4162739093. The cubic root of 3680321 is about 154.3933414804.

The spelling of 3680321 in words is "three million, six hundred eighty thousand, three hundred twenty-one".