118388247 has 16 divisors (see below), whose sum is σ = 159387648. Its totient is φ = 78161760.

The previous prime is 118388243. The next prime is 118388267. The reversal of 118388247 is 742883811.

It is not a de Polignac number, because 118388247 - 2² = 118388243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 118388199 and 118388208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118388243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180973 + ... + 181625.

It is an arithmetic number, because the mean of its divisors is an integer number (9961728).

Almost surely, 2^118388247 is an apocalyptic number.

118388247 is a deficient number, since it is larger than the sum of its proper divisors (40999401).

118388247 is a wasteful number, since it uses less digits than its factorization.

118388247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150.

The product of its digits is 86016, while the sum is 42.

The square root of 118388247 is about 10880.6363324945. The cubic root of 118388247 is about 491.0241621973.

The spelling of 118388247 in words is "one hundred eighteen million, three hundred eighty-eight thousand, two hundred forty-seven".