989575 has 12 divisors (see below), whose sum is σ = 1281168. Its totient is φ = 756800.

The previous prime is 989561. The next prime is 989579. The reversal of 989575 is 575989.

989575 = T₁₈₄ + T₁₈₅ + ... + T₂₂₉.

It is not a de Polignac number, because 989575 - 2¹⁷ = 858503 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989579) 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 11 ways as a sum of consecutive naturals, for example, 286 + ... + 1435.

It is an arithmetic number, because the mean of its divisors is an integer number (106764).

2⁹⁸⁹⁵⁷⁵ is an apocalyptic number.

989575 is a deficient number, since it is larger than the sum of its proper divisors (291593).

989575 is a wasteful number, since it uses less digits than its factorization.

989575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754 (or 1749 counting only the distinct ones).

The product of its digits is 113400, while the sum is 43.

The square root of 989575 is about 994.7738436449. The cubic root of 989575 is about 99.6512853947.

The spelling of 989575 in words is "nine hundred eighty-nine thousand, five hundred seventy-five".