989785001 has 2 divisors, whose sum is σ = 989785002. Its totient is φ = 989785000.

The previous prime is 989784973. The next prime is 989785009. The reversal of 989785001 is 100587989.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 957283600 + 32501401 = 30940^2 + 5701^2 .

It is an emirp because it is prime and its reverse (100587989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989785001 - 2⁶ = 989784937 is a prime.

It is not a weakly prime, because it can be changed into another prime (989785009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494892500 + 494892501.

It is an arithmetic number, because the mean of its divisors is an integer number (494892501).

Almost surely, 2^989785001 is an apocalyptic number.

It is an amenable number.

989785001 is a deficient number, since it is larger than the sum of its proper divisors (1).

989785001 is an equidigital number, since it uses as much as digits as its factorization.

989785001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 989785001 is about 31460.8487012032. The cubic root of 989785001 is about 996.5833400631.

The spelling of 989785001 in words is "nine hundred eighty-nine million, seven hundred eighty-five thousand, one".