989001 has 24 divisors (see below), whose sum is σ = 1572480. Its totient is φ = 595296.

The previous prime is 988979. The next prime is 989011. The reversal of 989001 is 100989.

It is not a de Polignac number, because 989001 - 2⁶ = 988937 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989011) 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 in 23 ways as a sum of consecutive naturals, for example, 9190 + ... + 9296.

It is an arithmetic number, because the mean of its divisors is an integer number (65520).

2⁹⁸⁹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

989001 is a deficient number, since it is larger than the sum of its proper divisors (583479).

989001 is a wasteful number, since it uses less digits than its factorization.

989001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 989001 is about 994.4852940089. The cubic root of 989001 is about 99.6320141921.

The spelling of 989001 in words is "nine hundred eighty-nine thousand, one".