989566001 has 2 divisors, whose sum is σ = 989566002. Its totient is φ = 989566000.

The previous prime is 989565989. The next prime is 989566033. The reversal of 989566001 is 100665989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 952648225 + 36917776 = 30865^2 + 6076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989566001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (989566901) 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, 494783000 + 494783001.

It is an arithmetic number, because the mean of its divisors is an integer number (494783001).

Almost surely, 2^989566001 is an apocalyptic number.

It is an amenable number.

989566001 is a deficient number, since it is larger than the sum of its proper divisors (1).

989566001 is an equidigital number, since it uses as much as digits as its factorization.

989566001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 989566001 is about 31457.3679922526. The cubic root of 989566001 is about 996.5098332409.

The spelling of 989566001 in words is "nine hundred eighty-nine million, five hundred sixty-six thousand, one".