989866133 has 2 divisors, whose sum is σ = 989866134. Its totient is φ = 989866132.

The previous prime is 989866109. The next prime is 989866139. The reversal of 989866133 is 331668989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 919423684 + 70442449 = 30322^2 + 8393^2 .

It is a cyclic number.

It is not a de Polignac number, because 989866133 - 2¹⁰ = 989865109 is a prime.

It is a super-2 number, since 2×989866133² = 1959669922520747378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989866139) 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, 494933066 + 494933067.

It is an arithmetic number, because the mean of its divisors is an integer number (494933067).

Almost surely, 2^989866133 is an apocalyptic number.

It is an amenable number.

989866133 is a deficient number, since it is larger than the sum of its proper divisors (1).

989866133 is an equidigital number, since it uses as much as digits as its factorization.

989866133 is an odious number, because the sum of its binary digits is odd.

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

The square root of 989866133 is about 31462.1380869133. The cubic root of 989866133 is about 996.6105690708.

The spelling of 989866133 in words is "nine hundred eighty-nine million, eight hundred sixty-six thousand, one hundred thirty-three".