1966303 has 2 divisors, whose sum is σ = 1966304. Its totient is φ = 1966302.

The previous prime is 1966301. The next prime is 1966331. The reversal of 1966303 is 3036691.

It is an a-pointer prime, because the next prime (1966331) can be obtained adding 1966303 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1966303 - 2¹ = 1966301 is a prime.

Together with 1966301, it forms a pair of twin primes.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1966301) 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 as a sum of consecutive naturals, namely, 983151 + 983152.

It is an arithmetic number, because the mean of its divisors is an integer number (983152).

2^1966303 is an apocalyptic number.

1966303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966303 is an equidigital number, since it uses as much as digits as its factorization.

1966303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 1966303 is about 1402.2492645746. The cubic root of 1966303 is about 125.2805007505.

The spelling of 1966303 in words is "one million, nine hundred sixty-six thousand, three hundred three".