395831 has 4 divisors (see below), whose sum is σ = 402600. Its totient is φ = 389064.

The previous prime is 395803. The next prime is 395849. The reversal of 395831 is 138593.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 395831 - 2⁶ = 395767 is a prime.

It is a super-2 number, since 2×395831² = 313364361122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 395794 and 395803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3296 + ... + 3413.

It is an arithmetic number, because the mean of its divisors is an integer number (100650).

2³⁹⁵⁸³¹ is an apocalyptic number.

395831 is a deficient number, since it is larger than the sum of its proper divisors (6769).

395831 is an equidigital number, since it uses as much as digits as its factorization.

395831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768.

The product of its digits is 3240, while the sum is 29.

The square root of 395831 is about 629.1510152579. The cubic root of 395831 is about 73.4237566858.

The spelling of 395831 in words is "three hundred ninety-five thousand, eight hundred thirty-one".