395640341 has 2 divisors, whose sum is σ = 395640342. Its totient is φ = 395640340.

The previous prime is 395640317. The next prime is 395640347. The reversal of 395640341 is 143046593.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362750116 + 32890225 = 19046^2 + 5735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-395640341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395640347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197820170 + 197820171.

It is an arithmetic number, because the mean of its divisors is an integer number (197820171).

Almost surely, 2^395640341 is an apocalyptic number.

It is an amenable number.

395640341 is a deficient number, since it is larger than the sum of its proper divisors (1).

395640341 is an equidigital number, since it uses as much as digits as its factorization.

395640341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 395640341 is about 19890.7099169436. The cubic root of 395640341 is about 734.1196617566.

The spelling of 395640341 in words is "three hundred ninety-five million, six hundred forty thousand, three hundred forty-one".