396643 has 6 divisors (see below), whose sum is σ = 429684. Its totient is φ = 365976.

The previous prime is 396637. The next prime is 396647. The reversal of 396643 is 346693.

It is not a de Polignac number, because 396643 - 2¹⁷ = 265571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1005 + ... + 1342.

It is an arithmetic number, because the mean of its divisors is an integer number (71614).

2³⁹⁶⁶⁴³ is an apocalyptic number.

396643 is a deficient number, since it is larger than the sum of its proper divisors (33041).

396643 is a wasteful number, since it uses less digits than its factorization.

396643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373 (or 2360 counting only the distinct ones).

The product of its digits is 11664, while the sum is 31.

The square root of 396643 is about 629.7959987170. The cubic root of 396643 is about 73.4739290817.

The spelling of 396643 in words is "three hundred ninety-six thousand, six hundred forty-three".