396641 has 4 divisors (see below), whose sum is σ = 453312. Its totient is φ = 339972.

The previous prime is 396637. The next prime is 396647. The reversal of 396641 is 146693.

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: 146693 = 17 ⋅8629.

It is a cyclic number.

It is not a de Polignac number, because 396641 - 2² = 396637 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 3 ways as a sum of consecutive naturals, for example, 28325 + ... + 28338.

It is an arithmetic number, because the mean of its divisors is an integer number (113328).

2³⁹⁶⁶⁴¹ is an apocalyptic number.

It is an amenable number.

396641 is a deficient number, since it is larger than the sum of its proper divisors (56671).

396641 is an equidigital number, since it uses as much as digits as its factorization.

396641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56670.

The product of its digits is 3888, while the sum is 29.

The square root of 396641 is about 629.7944108993. The cubic root of 396641 is about 73.4738055886.

The spelling of 396641 in words is "three hundred ninety-six thousand, six hundred forty-one".