1966447 has 4 divisors (see below), whose sum is σ = 2247376. Its totient is φ = 1685520.

The previous prime is 1966429. The next prime is 1966463. The reversal of 1966447 is 7446691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7446691 = 7 ⋅1063813.

It is a cyclic number.

It is not a de Polignac number, because 1966447 - 2¹¹ = 1964399 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140454 + ... + 140467.

It is an arithmetic number, because the mean of its divisors is an integer number (561844).

2^1966447 is an apocalyptic number.

1966447 is a deficient number, since it is larger than the sum of its proper divisors (280929).

1966447 is an equidigital number, since it uses as much as digits as its factorization.

1966447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280928.

The product of its digits is 36288, while the sum is 37.

The square root of 1966447 is about 1402.3006097125. The cubic root of 1966447 is about 125.2835589349.

It can be divided in two parts, 19 and 66447, that added together give a palindrome (66466).

The spelling of 1966447 in words is "one million, nine hundred sixty-six thousand, four hundred forty-seven".