113549 has 4 divisors (see below), whose sum is σ = 114240. Its totient is φ = 112860.

The previous prime is 113539. The next prime is 113557. The reversal of 113549 is 945311.

It is a happy number.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 945311 = 47 ⋅20113.

It is a cyclic number.

It is not a de Polignac number, because 113549 - 2¹² = 109453 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113539) 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 3 ways as a sum of consecutive naturals, for example, 62 + ... + 480.

It is an arithmetic number, because the mean of its divisors is an integer number (28560).

2¹¹³⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

113549 is a deficient number, since it is larger than the sum of its proper divisors (691).

113549 is an equidigital number, since it uses as much as digits as its factorization.

113549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690.

The product of its digits is 540, while the sum is 23.

The square root of 113549 is about 336.9703251030. The cubic root of 113549 is about 48.4240494738.

Subtracting from 113549 its sum of digits (23), we obtain a triangular number (113526 = T₄₇₆).

The spelling of 113549 in words is "one hundred thirteen thousand, five hundred forty-nine".