395666593 has 4 divisors (see below), whose sum is σ = 452190400. Its totient is φ = 339142788.

The previous prime is 395666519. The next prime is 395666597.

It is a happy number.

395666593 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 395666593 - 2⁹ = 395666081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 395666593.

It is not an unprimeable number, because it can be changed into a prime (395666597) 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, 28261893 + ... + 28261906.

It is an arithmetic number, because the mean of its divisors is an integer number (113047600).

Almost surely, 2^395666593 is an apocalyptic number.

It is an amenable number.

395666593 is a deficient number, since it is larger than the sum of its proper divisors (56523807).

395666593 is an equidigital number, since it uses as much as digits as its factorization.

395666593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56523806.

The product of its digits is 3936600, while the sum is 52.

The square root of 395666593 is about 19891.3698120567. The cubic root of 395666593 is about 734.1358984587.

The spelling of 395666593 in words is "three hundred ninety-five million, six hundred sixty-six thousand, five hundred ninety-three".