1966897 has 2 divisors, whose sum is σ = 1966898. Its totient is φ = 1966896.

The previous prime is 1966889. The next prime is 1966901. The reversal of 1966897 is 7986691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1962801 + 4096 = 1401^2 + 64^2 .

It is a cyclic number.

It is not a de Polignac number, because 1966897 - 2³ = 1966889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1966807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983448 + 983449.

It is an arithmetic number, because the mean of its divisors is an integer number (983449).

2^1966897 is an apocalyptic number.

It is an amenable number.

1966897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966897 is an equidigital number, since it uses as much as digits as its factorization.

1966897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 1966897 is about 1402.4610511526. The cubic root of 1966897 is about 125.2931147991.

The spelling of 1966897 in words is "one million, nine hundred sixty-six thousand, eight hundred ninety-seven".