99549 has 10 divisors (see below), whose sum is σ = 148830. Its totient is φ = 66312.

The previous prime is 99529. The next prime is 99551. The reversal of 99549 is 94599.

It can be written as a sum of positive squares in only one way, i.e., 99225 + 324 = 315^2 + 18^2 .

It is not a de Polignac number, because 99549 - 2¹¹ = 97501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99529) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 534 + ... + 695.

It is an arithmetic number, because the mean of its divisors is an integer number (14883).

2⁹⁹⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

99549 is a deficient number, since it is larger than the sum of its proper divisors (49281).

99549 is a wasteful number, since it uses less digits than its factorization.

99549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 1232 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 99549 is about 315.5138665732. The cubic root of 99549 is about 46.3460046199.

Subtracting from 99549 its reverse (94599), we obtain a triangular number (4950 = T₉₉).

The spelling of 99549 in words is "ninety-nine thousand, five hundred forty-nine".