118317893 has 4 divisors (see below), whose sum is σ = 119365068. Its totient is φ = 117270720.

The previous prime is 118317887. The next prime is 118317907. The reversal of 118317893 is 398713811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 398713811 = 163 ⋅2446097.

It can be written as a sum of positive squares in 2 ways, for example, as 17656804 + 100661089 = 4202^2 + 10033^2 .

It is a cyclic number.

It is not a de Polignac number, because 118317893 - 2⁴ = 118317877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118317893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118317853) 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, 523418 + ... + 523643.

It is an arithmetic number, because the mean of its divisors is an integer number (29841267).

Almost surely, 2^118317893 is an apocalyptic number.

It is an amenable number.

118317893 is a deficient number, since it is larger than the sum of its proper divisors (1047175).

118317893 is a wasteful number, since it uses less digits than its factorization.

118317893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047174.

The product of its digits is 36288, while the sum is 41.

The square root of 118317893 is about 10877.4028609774. The cubic root of 118317893 is about 490.9268767541.

The spelling of 118317893 in words is "one hundred eighteen million, three hundred seventeen thousand, eight hundred ninety-three".