117784775 has 6 divisors (see below), whose sum is σ = 146053152. Its totient is φ = 94227800.

The previous prime is 117784757. The next prime is 117784831. The reversal of 117784775 is 577487711.

It is a de Polignac number, because none of the positive numbers 2^k-117784775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2355671 + ... + 2355720.

It is an arithmetic number, because the mean of its divisors is an integer number (24342192).

Almost surely, 2^117784775 is an apocalyptic number.

117784775 is a deficient number, since it is larger than the sum of its proper divisors (28268377).

117784775 is an equidigital number, since it uses as much as digits as its factorization.

117784775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4711401 (or 4711396 counting only the distinct ones).

The product of its digits is 384160, while the sum is 47.

The square root of 117784775 is about 10852.8694362367. The cubic root of 117784775 is about 490.1884253814.

The spelling of 117784775 in words is "one hundred seventeen million, seven hundred eighty-four thousand, seven hundred seventy-five".