117205605 has 24 divisors (see below), whose sum is σ = 221626080. Its totient is φ = 56826720.

The previous prime is 117205601. The next prime is 117205607. The reversal of 117205605 is 506502711.

It is not a de Polignac number, because 117205605 - 2² = 117205601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117205601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117895 + ... + 118884.

It is an arithmetic number, because the mean of its divisors is an integer number (9234420).

Almost surely, 2^117205605 is an apocalyptic number.

117205605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117205605 is a deficient number, since it is larger than the sum of its proper divisors (104420475).

117205605 is a wasteful number, since it uses less digits than its factorization.

117205605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236801 (or 236798 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 117205605 is about 10826.1537491392. The cubic root of 117205605 is about 489.3836551563.

The spelling of 117205605 in words is "one hundred seventeen million, two hundred five thousand, six hundred five".