118161871 has 4 divisors (see below), whose sum is σ = 119585592. Its totient is φ = 116738152.

The previous prime is 118161859. The next prime is 118161881. The reversal of 118161871 is 178161811.

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

It is a cyclic number.

It is not a de Polignac number, because 118161871 - 2⁹ = 118161359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118161851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711736 + ... + 711901.

It is an arithmetic number, because the mean of its divisors is an integer number (29896398).

Almost surely, 2^118161871 is an apocalyptic number.

118161871 is a deficient number, since it is larger than the sum of its proper divisors (1423721).

118161871 is an equidigital number, since it uses as much as digits as its factorization.

118161871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423720.

The product of its digits is 2688, while the sum is 34.

The square root of 118161871 is about 10870.2286544488. The cubic root of 118161871 is about 490.7109920053.

The spelling of 118161871 in words is "one hundred eighteen million, one hundred sixty-one thousand, eight hundred seventy-one".