396817 has 4 divisors (see below), whose sum is σ = 401920. Its totient is φ = 391716.

The previous prime is 396733. The next prime is 396833. The reversal of 396817 is 718693.

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, and also an emirpimes, since its reverse is a distinct semiprime: 718693 = 127 ⋅5659.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2433 + ... + 2590.

It is an arithmetic number, because the mean of its divisors is an integer number (100480).

2³⁹⁶⁸¹⁷ is an apocalyptic number.

It is an amenable number.

396817 is a deficient number, since it is larger than the sum of its proper divisors (5103).

396817 is an equidigital number, since it uses as much as digits as its factorization.

396817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5102.

The product of its digits is 9072, while the sum is 34.

The square root of 396817 is about 629.9341235399. The cubic root of 396817 is about 73.4846713989.

The spelling of 396817 in words is "three hundred ninety-six thousand, eight hundred seventeen".