118728103 has 4 divisors (see below), whose sum is σ = 127861048. Its totient is φ = 109595160.

The previous prime is 118728019. The next prime is 118728107. The reversal of 118728103 is 301827811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301827811 = 31 ⋅9736381.

It is a cyclic number.

It is not a de Polignac number, because 118728103 - 2⁹ = 118727591 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 (118728107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4566453 + ... + 4566478.

It is an arithmetic number, because the mean of its divisors is an integer number (31965262).

Almost surely, 2^118728103 is an apocalyptic number.

118728103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

118728103 is a deficient number, since it is larger than the sum of its proper divisors (9132945).

118728103 is an equidigital number, since it uses as much as digits as its factorization.

118728103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132944.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 118728103 is about 10896.2426092667. The cubic root of 118728103 is about 491.4935727498.

The spelling of 118728103 in words is "one hundred eighteen million, seven hundred twenty-eight thousand, one hundred three".