118217487 has 16 divisors (see below), whose sum is σ = 166158720. Its totient is φ = 74556000.

The previous prime is 118217483. The next prime is 118217497. The reversal of 118217487 is 784712811.

It is not a de Polignac number, because 118217487 - 2² = 118217483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118217483) 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, 61237 + ... + 63137.

It is an arithmetic number, because the mean of its divisors is an integer number (10384920).

Almost surely, 2^118217487 is an apocalyptic number.

118217487 is a deficient number, since it is larger than the sum of its proper divisors (47941233).

118217487 is a wasteful number, since it uses less digits than its factorization.

118217487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014.

The product of its digits is 25088, while the sum is 39.

The square root of 118217487 is about 10872.7865333593. The cubic root of 118217487 is about 490.7879686183.

The spelling of 118217487 in words is "one hundred eighteen million, two hundred seventeen thousand, four hundred eighty-seven".