395819 has 4 divisors (see below), whose sum is σ = 399840. Its totient is φ = 391800.

The previous prime is 395803. The next prime is 395849. The reversal of 395819 is 918593.

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 395819 - 2⁴ = 395803 is a prime.

It is a super-2 number, since 2×395819² = 313345361522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395849) 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, 1859 + ... + 2060.

It is an arithmetic number, because the mean of its divisors is an integer number (99960).

2³⁹⁵⁸¹⁹ is an apocalyptic number.

395819 is a deficient number, since it is larger than the sum of its proper divisors (4021).

395819 is a wasteful number, since it uses less digits than its factorization.

395819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020.

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

The square root of 395819 is about 629.1414785245. The cubic root of 395819 is about 73.4230147075.

The spelling of 395819 in words is "three hundred ninety-five thousand, eight hundred nineteen".