117985185 has 24 divisors (see below), whose sum is σ = 216538920. Its totient is φ = 59223552.

The previous prime is 117985183. The next prime is 117985207. The reversal of 117985185 is 581589711.

It can be written as a sum of positive squares in 4 ways, for example, as 35247969 + 82737216 = 5937^2 + 9096^2 .

It is not a de Polignac number, because 117985185 - 2¹ = 117985183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 117985185.

It is not an unprimeable number, because it can be changed into a prime (117985183) 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, 76350 + ... + 77879.

It is an arithmetic number, because the mean of its divisors is an integer number (9022455).

Almost surely, 2^117985185 is an apocalyptic number.

117985185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117985185 is a deficient number, since it is larger than the sum of its proper divisors (98553735).

117985185 is a wasteful number, since it uses less digits than its factorization.

117985185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154257 (or 154254 counting only the distinct ones).

The product of its digits is 100800, while the sum is 45.

The square root of 117985185 is about 10862.0985541469. The cubic root of 117985185 is about 490.4662852816.

The spelling of 117985185 in words is "one hundred seventeen million, nine hundred eighty-five thousand, one hundred eighty-five".