117555785 has 8 divisors (see below), whose sum is σ = 142014600. Its totient is φ = 93412864.

The previous prime is 117555761. The next prime is 117555811. The reversal of 117555785 is 587555711.

It can be written as a sum of positive squares in 4 ways, for example, as 1261129 + 116294656 = 1123^2 + 10784^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117555785 - 2¹⁸ = 117293641 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78152 + ... + 79641.

It is an arithmetic number, because the mean of its divisors is an integer number (17751825).

Almost surely, 2^117555785 is an apocalyptic number.

It is an amenable number.

117555785 is a deficient number, since it is larger than the sum of its proper divisors (24458815).

117555785 is a wasteful number, since it uses less digits than its factorization.

117555785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157947.

The product of its digits is 245000, while the sum is 44.

The square root of 117555785 is about 10842.3145591705. The cubic root of 117555785 is about 489.8705544504.

The spelling of 117555785 in words is "one hundred seventeen million, five hundred fifty-five thousand, seven hundred eighty-five".