1989353 has 2 divisors, whose sum is σ = 1989354. Its totient is φ = 1989352.

The previous prime is 1989341. The next prime is 1989401. The reversal of 1989353 is 3539891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1982464 + 6889 = 1408^2 + 83^2 .

It is a cyclic number.

It is not a de Polignac number, because 1989353 - 2¹² = 1985257 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 (1989553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994676 + 994677.

It is an arithmetic number, because the mean of its divisors is an integer number (994677).

2^1989353 is an apocalyptic number.

It is an amenable number.

1989353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1989353 is an equidigital number, since it uses as much as digits as its factorization.

1989353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 38.

The square root of 1989353 is about 1410.4442562540. Note that the first 3 decimals coincide. The cubic root of 1989353 is about 125.7681340914.

The spelling of 1989353 in words is "one million, nine hundred eighty-nine thousand, three hundred fifty-three".