3937321 has 2 divisors, whose sum is σ = 3937322. Its totient is φ = 3937320.

The previous prime is 3937303. The next prime is 3937337. The reversal of 3937321 is 1237393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3748096 + 189225 = 1936^2 + 435^2 .

It is an emirp because it is prime and its reverse (1237393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3937321 - 2⁵ = 3937289 is a prime.

It is an Ulam number.

3937321 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3937321.

It is not a weakly prime, because it can be changed into another prime (3937621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1968660 + 1968661.

It is an arithmetic number, because the mean of its divisors is an integer number (1968661).

Almost surely, 2^3937321 is an apocalyptic number.

It is an amenable number.

3937321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3937321 is an equidigital number, since it uses as much as digits as its factorization.

3937321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402, while the sum is 28.

The square root of 3937321 is about 1984.2683790254. The cubic root of 3937321 is about 157.9065970409.

The spelling of 3937321 in words is "three million, nine hundred thirty-seven thousand, three hundred twenty-one".