1966343 has 2 divisors, whose sum is σ = 1966344. Its totient is φ = 1966342.

The previous prime is 1966337. The next prime is 1966381. The reversal of 1966343 is 3436691.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1966343 - 2²⁰ = 917767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1966303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983171 + 983172.

It is an arithmetic number, because the mean of its divisors is an integer number (983172).

2^1966343 is an apocalyptic number.

1966343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966343 is an equidigital number, since it uses as much as digits as its factorization.

1966343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 32.

The square root of 1966343 is about 1402.2635273015. The cubic root of 1966343 is about 125.2813502611.

The spelling of 1966343 in words is "one million, nine hundred sixty-six thousand, three hundred forty-three".