395999 has 4 divisors (see below), whose sum is σ = 397320. Its totient is φ = 394680.

The previous prime is 395971. The next prime is 396001. The reversal of 395999 is 999593.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 999593 = 7 ⋅142799.

It is a cyclic number.

It is not a de Polignac number, because 395999 - 2¹² = 391903 is a prime.

It is a Duffinian number.

395999 is a modest number, since divided by 999 gives 395 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32 + ... + 890.

It is an arithmetic number, because the mean of its divisors is an integer number (99330).

2³⁹⁵⁹⁹⁹ is an apocalyptic number.

395999 is a deficient number, since it is larger than the sum of its proper divisors (1321).

395999 is an equidigital number, since it uses as much as digits as its factorization.

395999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its digits is 98415, while the sum is 44.

The square root of 395999 is about 629.2845143494. The cubic root of 395999 is about 73.4341428071.

The spelling of 395999 in words is "three hundred ninety-five thousand, nine hundred ninety-nine".