118128863 has 4 divisors (see below), whose sum is σ = 118469640. Its totient is φ = 117788088.

The previous prime is 118128847. The next prime is 118128889. The reversal of 118128863 is 368821811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 368821811 = 16091 ⋅22921.

It is a cyclic number.

It is not a de Polignac number, because 118128863 - 2⁴ = 118128847 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 (118128823) 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, 169868 + ... + 170561.

It is an arithmetic number, because the mean of its divisors is an integer number (29617410).

Almost surely, 2^118128863 is an apocalyptic number.

118128863 is a deficient number, since it is larger than the sum of its proper divisors (340777).

118128863 is an equidigital number, since it uses as much as digits as its factorization.

118128863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340776.

The product of its digits is 18432, while the sum is 38.

The square root of 118128863 is about 10868.7102730729. The cubic root of 118128863 is about 490.6652950961.

The spelling of 118128863 in words is "one hundred eighteen million, one hundred twenty-eight thousand, eight hundred sixty-three".