117211605 has 16 divisors (see below), whose sum is σ = 214329984. Its totient is φ = 53582400.

The previous prime is 117211571. The next prime is 117211613. The reversal of 117211605 is 506112711.

It is not a de Polignac number, because 117211605 - 2⁷ = 117211477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558046 + ... + 558255.

It is an arithmetic number, because the mean of its divisors is an integer number (13395624).

Almost surely, 2^117211605 is an apocalyptic number.

117211605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117211605 is a deficient number, since it is larger than the sum of its proper divisors (97118379).

117211605 is a wasteful number, since it uses less digits than its factorization.

117211605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116316.

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 117211605 is about 10826.4308523169. The cubic root of 117211605 is about 489.3920058714.

The spelling of 117211605 in words is "one hundred seventeen million, two hundred eleven thousand, six hundred five".