117993385 has 4 divisors (see below), whose sum is σ = 141592068. Its totient is φ = 94394704.

The previous prime is 117993377. The next prime is 117993389. The reversal of 117993385 is 583399711.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64834704 + 53158681 = 8052^2 + 7291^2 .

It is a cyclic number.

It is not a de Polignac number, because 117993385 - 2³ = 117993377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117993389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11799334 + ... + 11799343.

It is an arithmetic number, because the mean of its divisors is an integer number (35398017).

Almost surely, 2^117993385 is an apocalyptic number.

It is an amenable number.

117993385 is a deficient number, since it is larger than the sum of its proper divisors (23598683).

117993385 is an equidigital number, since it uses as much as digits as its factorization.

117993385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23598682.

The product of its digits is 204120, while the sum is 46.

The square root of 117993385 is about 10862.4760068780. The cubic root of 117993385 is about 490.4776475284.

The spelling of 117993385 in words is "one hundred seventeen million, nine hundred ninety-three thousand, three hundred eighty-five".