989555 has 16 divisors (see below), whose sum is σ = 1387200. Its totient is φ = 677376.

The previous prime is 989533. The next prime is 989557. The reversal of 989555 is 555989.

It is a happy number.

It is not a de Polignac number, because 989555 - 2¹⁶ = 924019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1427 + ... + 2003.

It is an arithmetic number, because the mean of its divisors is an integer number (86700).

2⁹⁸⁹⁵⁵⁵ is an apocalyptic number.

989555 is a deficient number, since it is larger than the sum of its proper divisors (397645).

989555 is an equidigital number, since it uses as much as digits as its factorization.

989555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 589 counting only the distinct ones).

The product of its digits is 81000, while the sum is 41.

The square root of 989555 is about 994.7637910580. The cubic root of 989555 is about 99.6506140496.

The spelling of 989555 in words is "nine hundred eighty-nine thousand, five hundred fifty-five".