989549 has 4 divisors (see below), whose sum is σ = 1079520. Its totient is φ = 899580.

The previous prime is 989533. The next prime is 989557. The reversal of 989549 is 945989.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 945989 = 11 ⋅85999.

It is not a de Polignac number, because 989549 - 2⁴ = 989533 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44969 + ... + 44990.

It is an arithmetic number, because the mean of its divisors is an integer number (269880).

2⁹⁸⁹⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

989549 is a deficient number, since it is larger than the sum of its proper divisors (89971).

989549 is a wasteful number, since it uses less digits than its factorization.

989549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89970.

The product of its digits is 116640, while the sum is 44.

The square root of 989549 is about 994.7607752621. The cubic root of 989549 is about 99.6504126443.

The spelling of 989549 in words is "nine hundred eighty-nine thousand, five hundred forty-nine".