118405947 has 16 divisors (see below), whose sum is σ = 172435968. Its totient is φ = 71674080.

The previous prime is 118405939. The next prime is 118405981. The reversal of 118405947 is 749504811.

It is not a de Polignac number, because 118405947 - 2³ = 118405939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118405907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34773 + ... + 38025.

It is an arithmetic number, because the mean of its divisors is an integer number (10777248).

Almost surely, 2^118405947 is an apocalyptic number.

118405947 is a deficient number, since it is larger than the sum of its proper divisors (54030021).

118405947 is a wasteful number, since it uses less digits than its factorization.

118405947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 118405947 is about 10881.4496736418. The cubic root of 118405947 is about 491.0486316718.

The spelling of 118405947 in words is "one hundred eighteen million, four hundred five thousand, nine hundred forty-seven".