117805841 has 4 divisors (see below), whose sum is σ = 118456884. Its totient is φ = 117154800.

The previous prime is 117805819. The next prime is 117805843. The reversal of 117805841 is 148508711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 148508711 = 13 ⋅11423747.

It can be written as a sum of positive squares in 2 ways, for example, as 59985025 + 57820816 = 7745^2 + 7604^2 .

It is a cyclic number.

It is not a de Polignac number, because 117805841 - 2¹⁴ = 117789457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (117805843) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 325250 + ... + 325611.

It is an arithmetic number, because the mean of its divisors is an integer number (29614221).

Almost surely, 2^117805841 is an apocalyptic number.

It is an amenable number.

117805841 is a deficient number, since it is larger than the sum of its proper divisors (651043).

117805841 is an equidigital number, since it uses as much as digits as its factorization.

117805841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651042.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 117805841 is about 10853.8399195861. The cubic root of 117805841 is about 490.2176473071.

The spelling of 117805841 in words is "one hundred seventeen million, eight hundred five thousand, eight hundred forty-one".