3916321 has 2 divisors, whose sum is σ = 3916322. Its totient is φ = 3916320.

The previous prime is 3916313. The next prime is 3916327. The reversal of 3916321 is 1236193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3629025 + 287296 = 1905^2 + 536^2 .

It is a cyclic number.

It is not a de Polignac number, because 3916321 - 2³ = 3916313 is a prime.

It is not a weakly prime, because it can be changed into another prime (3916327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1958160 + 1958161.

It is an arithmetic number, because the mean of its divisors is an integer number (1958161).

Almost surely, 2^3916321 is an apocalyptic number.

It is an amenable number.

3916321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3916321 is an equidigital number, since it uses as much as digits as its factorization.

3916321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 25.

The square root of 3916321 is about 1978.9696814252. The cubic root of 3916321 is about 157.6253608470.

The spelling of 3916321 in words is "three million, nine hundred sixteen thousand, three hundred twenty-one".