1966830389 has 2 divisors, whose sum is σ = 1966830390. Its totient is φ = 1966830388.

The previous prime is 1966830367. The next prime is 1966830443. The reversal of 1966830389 is 9830386691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1179579025 + 787251364 = 34345^2 + 28058^2 .

It is a cyclic number.

It is not a de Polignac number, because 1966830389 - 2⁸ = 1966830133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1966830389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1966830329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983415194 + 983415195.

It is an arithmetic number, because the mean of its divisors is an integer number (983415195).

Almost surely, 2^1966830389 is an apocalyptic number.

It is an amenable number.

1966830389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966830389 is an equidigital number, since it uses as much as digits as its factorization.

1966830389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The square root of 1966830389 is about 44348.9615323741. The cubic root of 1966830389 is about 1252.9170038956.

The spelling of 1966830389 in words is "one billion, nine hundred sixty-six million, eight hundred thirty thousand, three hundred eighty-nine".