395987 has 4 divisors (see below), whose sum is σ = 405240. Its totient is φ = 386736.

The previous prime is 395971. The next prime is 396001. The reversal of 395987 is 789593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789593 = 7 ⋅112799.

It is a cyclic number.

It is not a de Polignac number, because 395987 - 2⁴ = 395971 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 395987.

It is not an unprimeable number, because it can be changed into a prime (395287) 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, 4562 + ... + 4647.

It is an arithmetic number, because the mean of its divisors is an integer number (101310).

2³⁹⁵⁹⁸⁷ is an apocalyptic number.

395987 is a deficient number, since it is larger than the sum of its proper divisors (9253).

395987 is an equidigital number, since it uses as much as digits as its factorization.

395987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9252.

The product of its digits is 68040, while the sum is 41.

The square root of 395987 is about 629.2749796393. The cubic root of 395987 is about 73.4334010388.

The spelling of 395987 in words is "three hundred ninety-five thousand, nine hundred eighty-seven".