395891 has 2 divisors, whose sum is σ = 395892. Its totient is φ = 395890.

The previous prime is 395887. The next prime is 395897. The reversal of 395891 is 198593.

It is a weak prime.

It is an emirp because it is prime and its reverse (198593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 395891 - 2² = 395887 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 395891.

It is not a weakly prime, because it can be changed into another prime (395897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197945 + 197946.

It is an arithmetic number, because the mean of its divisors is an integer number (197946).

2³⁹⁵⁸⁹¹ is an apocalyptic number.

395891 is a deficient number, since it is larger than the sum of its proper divisors (1).

395891 is an equidigital number, since it uses as much as digits as its factorization.

395891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 35.

The square root of 395891 is about 629.1986967564. The cubic root of 395891 is about 73.4274663521.

The spelling of 395891 in words is "three hundred ninety-five thousand, eight hundred ninety-one".