1966443 has 8 divisors (see below), whose sum is σ = 2760000. Its totient is φ = 1241928.

The previous prime is 1966429. The next prime is 1966463. The reversal of 1966443 is 3446691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1966443 - 2⁴ = 1966427 is a prime.

It is a d-powerful number, because it can be written as 1 + 9 + 6⁷ + 6⁸ + 4³ + 4⁴ + 3⁸ .

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1966463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17193 + ... + 17306.

It is an arithmetic number, because the mean of its divisors is an integer number (345000).

2^1966443 is an apocalyptic number.

1966443 is a deficient number, since it is larger than the sum of its proper divisors (793557).

1966443 is a wasteful number, since it uses less digits than its factorization.

1966443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34521.

The product of its digits is 15552, while the sum is 33.

The square root of 1966443 is about 1402.2991834840. The cubic root of 1966443 is about 125.2834739874.

The spelling of 1966443 in words is "one million, nine hundred sixty-six thousand, four hundred forty-three".