8372321 has 2 divisors, whose sum is σ = 8372322. Its totient is φ = 8372320.

The previous prime is 8372317. The next prime is 8372327. The reversal of 8372321 is 1232738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8179600 + 192721 = 2860^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 8372321 - 2² = 8372317 is a prime.

It is not a weakly prime, because it can be changed into another prime (8372327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4186160 + 4186161.

It is an arithmetic number, because the mean of its divisors is an integer number (4186161).

Almost surely, 2^8372321 is an apocalyptic number.

It is an amenable number.

8372321 is a deficient number, since it is larger than the sum of its proper divisors (1).

8372321 is an equidigital number, since it uses as much as digits as its factorization.

8372321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 8372321 is about 2893.4963279742. The cubic root of 8372321 is about 203.0557492058.

The spelling of 8372321 in words is "eight million, three hundred seventy-two thousand, three hundred twenty-one".