118293987 has 24 divisors (see below), whose sum is σ = 189810000. Its totient is φ = 65263296.

The previous prime is 118293977. The next prime is 118294003. The reversal of 118293987 is 789392811.

It is not a de Polignac number, because 118293987 - 2¹⁸ = 118031843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118293907) 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 23 ways as a sum of consecutive naturals, for example, 9612 + ... + 18137.

It is an arithmetic number, because the mean of its divisors is an integer number (7908750).

Almost surely, 2^118293987 is an apocalyptic number.

118293987 is a deficient number, since it is larger than the sum of its proper divisors (71516013).

118293987 is a wasteful number, since it uses less digits than its factorization.

118293987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27795 (or 27788 counting only the distinct ones).

The product of its digits is 217728, while the sum is 48.

The square root of 118293987 is about 10876.3039218293. The cubic root of 118293987 is about 490.8938107820.

The spelling of 118293987 in words is "one hundred eighteen million, two hundred ninety-three thousand, nine hundred eighty-seven".