1966331 has 2 divisors, whose sum is σ = 1966332. Its totient is φ = 1966330.

The previous prime is 1966303. The next prime is 1966337. The reversal of 1966331 is 1336691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1966331 - 2¹⁴ = 1949947 is a prime.

It is a super-2 number, since 2×1966331² = 7732915203122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1966294 and 1966303.

It is not a weakly prime, because it can be changed into another prime (1966337) 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, 983165 + 983166.

It is an arithmetic number, because the mean of its divisors is an integer number (983166).

2^1966331 is an apocalyptic number.

1966331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966331 is an equidigital number, since it uses as much as digits as its factorization.

1966331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 29.

The square root of 1966331 is about 1402.2592484987. The cubic root of 1966331 is about 125.2810954091.

The spelling of 1966331 in words is "one million, nine hundred sixty-six thousand, three hundred thirty-one".