117609 has 8 divisors (see below), whose sum is σ = 158400. Its totient is φ = 77616.

The previous prime is 117577. The next prime is 117617. The reversal of 117609 is 906711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117609 - 2⁵ = 117577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492 + ... + 690.

It is an arithmetic number, because the mean of its divisors is an integer number (19800).

2¹¹⁷⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

117609 is a deficient number, since it is larger than the sum of its proper divisors (40791).

117609 is a wasteful number, since it uses less digits than its factorization.

117609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 117609 is about 342.9416860051. The cubic root of 117609 is about 48.9944461288.

It can be divided in two parts, 117 and 609, that multiplied together give a triangular number (71253 = T₃₇₇).

The spelling of 117609 in words is "one hundred seventeen thousand, six hundred nine".