117409 has 4 divisors (see below), whose sum is σ = 118404. Its totient is φ = 116416.

The previous prime is 117389. The next prime is 117413. The reversal of 117409 is 904711.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 904711 = 223 ⋅4057.

It can be written as a sum of positive squares in 2 ways, for example, as 91809 + 25600 = 303^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 117409 - 2⁷ = 117281 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117409.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117499) 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, 292 + ... + 565.

It is an arithmetic number, because the mean of its divisors is an integer number (29601).

2¹¹⁷⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

117409 is a deficient number, since it is larger than the sum of its proper divisors (995).

117409 is an equidigital number, since it uses as much as digits as its factorization.

117409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 117409 is about 342.6499671677. The cubic root of 117409 is about 48.9666578672.

The spelling of 117409 in words is "one hundred seventeen thousand, four hundred nine".