989543 has 4 divisors (see below), whose sum is σ = 991848. Its totient is φ = 987240.

The previous prime is 989533. The next prime is 989557. The reversal of 989543 is 345989.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 989543 - 2⁶ = 989479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 989497 and 989506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296 + ... + 1437.

It is an arithmetic number, because the mean of its divisors is an integer number (247962).

2⁹⁸⁹⁵⁴³ is an apocalyptic number.

989543 is a deficient number, since it is larger than the sum of its proper divisors (2305).

989543 is a wasteful number, since it uses less digits than its factorization.

989543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304.

The product of its digits is 38880, while the sum is 38.

The square root of 989543 is about 994.7577594570. The cubic root of 989543 is about 99.6502112381.

The spelling of 989543 in words is "nine hundred eighty-nine thousand, five hundred forty-three".