395405321 has 2 divisors, whose sum is σ = 395405322. Its totient is φ = 395405320.

The previous prime is 395405299. The next prime is 395405357. The reversal of 395405321 is 123504593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 303456400 + 91948921 = 17420^2 + 9589^2 .

It is a cyclic number.

It is not a de Polignac number, because 395405321 - 2¹⁰ = 395404297 is a prime.

It is a super-2 number, since 2×395405321² = 312690735750226082, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (395405921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197702660 + 197702661.

It is an arithmetic number, because the mean of its divisors is an integer number (197702661).

Almost surely, 2^395405321 is an apocalyptic number.

It is an amenable number.

395405321 is a deficient number, since it is larger than the sum of its proper divisors (1).

395405321 is an equidigital number, since it uses as much as digits as its factorization.

395405321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 395405321 is about 19884.8012562359. The cubic root of 395405321 is about 733.9742713104.

The spelling of 395405321 in words is "three hundred ninety-five million, four hundred five thousand, three hundred twenty-one".