117543 has 4 divisors (see below), whose sum is σ = 156728. Its totient is φ = 78360.

The previous prime is 117541. The next prime is 117563. The reversal of 117543 is 345711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345711 = 3 ⋅115237.

It is not a de Polignac number, because 117543 - 2¹ = 117541 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117541) 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, 19588 + ... + 19593.

It is an arithmetic number, because the mean of its divisors is an integer number (39182).

2¹¹⁷⁵⁴³ is an apocalyptic number.

117543 is a deficient number, since it is larger than the sum of its proper divisors (39185).

117543 is an equidigital number, since it uses as much as digits as its factorization.

117543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39184.

The product of its digits is 420, while the sum is 21.

The square root of 117543 is about 342.8454462291. The cubic root of 117543 is about 48.9852794876.

The spelling of 117543 in words is "one hundred seventeen thousand, five hundred forty-three".