443961 has 32 divisors (see below), whose sum is σ = 787200. Its totient is φ = 244944.

The previous prime is 443953. The next prime is 443983. The reversal of 443961 is 169344.

It is not a de Polignac number, because 443961 - 2³ = 443953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

443961 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15295 + ... + 15323.

It is an arithmetic number, because the mean of its divisors is an integer number (24600).

2⁴⁴³⁹⁶¹ is an apocalyptic number.

It is an amenable number.

443961 is a deficient number, since it is larger than the sum of its proper divisors (343239).

443961 is an frugal number, since it uses more digits than its factorization.

443961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 39 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 443961 is about 666.3039846797. The cubic root of 443961 is about 76.2866025110.

It can be divided in two parts, 44 and 3961, that added together give a triangular number (4005 = T₈₉).

The spelling of 443961 in words is "four hundred forty-three thousand, nine hundred sixty-one".