117999618 has 64 divisors (see below), whose sum is σ = 274337280. Its totient is φ = 33440000.

The previous prime is 117999593. The next prime is 117999631. The reversal of 117999618 is 816999711.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281413 + ... + 281831.

It is an arithmetic number, because the mean of its divisors is an integer number (4286520).

Almost surely, 2^117999618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117999618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137168640).

117999618 is an abundant number, since it is smaller than the sum of its proper divisors (156337662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117999618 is a wasteful number, since it uses less digits than its factorization.

117999618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703.

The product of its digits is 244944, while the sum is 51.

The square root of 117999618 is about 10862.7629082108. The cubic root of 117999618 is about 490.4862838695.

The spelling of 117999618 in words is "one hundred seventeen million, nine hundred ninety-nine thousand, six hundred eighteen".