1896966161 has 2 divisors, whose sum is σ = 1896966162. Its totient is φ = 1896966160.

The previous prime is 1896966121. The next prime is 1896966173. The reversal of 1896966161 is 1616696981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1876535761 + 20430400 = 43319^2 + 4520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1896966161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1896966121) 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, 948483080 + 948483081.

It is an arithmetic number, because the mean of its divisors is an integer number (948483081).

Almost surely, 2^1896966161 is an apocalyptic number.

It is an amenable number.

1896966161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1896966161 is an equidigital number, since it uses as much as digits as its factorization.

1896966161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 53.

The square root of 1896966161 is about 43554.1750122764. The cubic root of 1896966161 is about 1237.9027506009.

The spelling of 1896966161 in words is "one billion, eight hundred ninety-six million, nine hundred sixty-six thousand, one hundred sixty-one".