320328401 has 2 divisors, whose sum is σ = 320328402. Its totient is φ = 320328400.

The previous prime is 320328397. The next prime is 320328409. The reversal of 320328401 is 104823023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172948801 + 147379600 = 13151^2 + 12140^2 .

It is a cyclic number.

It is not a de Polignac number, because 320328401 - 2² = 320328397 is a prime.

It is a super-2 number, since 2×320328401² = 205220568974433602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320328409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160164200 + 160164201.

It is an arithmetic number, because the mean of its divisors is an integer number (160164201).

Almost surely, 2^320328401 is an apocalyptic number.

It is an amenable number.

320328401 is a deficient number, since it is larger than the sum of its proper divisors (1).

320328401 is an equidigital number, since it uses as much as digits as its factorization.

320328401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 320328401 is about 17897.7205531878. The cubic root of 320328401 is about 684.2242810957.

The spelling of 320328401 in words is "three hundred twenty million, three hundred twenty-eight thousand, four hundred one".