1989774133 has 2 divisors, whose sum is σ = 1989774134. Its totient is φ = 1989774132.

The previous prime is 1989774121. The next prime is 1989774167. The reversal of 1989774133 is 3314779891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1648522404 + 341251729 = 40602^2 + 18473^2 .

It is an emirp because it is prime and its reverse (3314779891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1989774133 is a prime.

It is a super-2 number, since 2×1989774133² = 7918402200711803378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1989774113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994887066 + 994887067.

It is an arithmetic number, because the mean of its divisors is an integer number (994887067).

Almost surely, 2^1989774133 is an apocalyptic number.

It is an amenable number.

1989774133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1989774133 is an equidigital number, since it uses as much as digits as its factorization.

1989774133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 52.

The square root of 1989774133 is about 44606.8843677744. The cubic root of 1989774133 is about 1257.7700822864.

The spelling of 1989774133 in words is "one billion, nine hundred eighty-nine million, seven hundred seventy-four thousand, one hundred thirty-three".