118144687 has 4 divisors (see below), whose sum is σ = 118200520. Its totient is φ = 118088856.

The previous prime is 118144681. The next prime is 118144709. The reversal of 118144687 is 786441811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118144687 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 (118144681) 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 3 ways as a sum of consecutive naturals, for example, 24612 + ... + 29017.

It is an arithmetic number, because the mean of its divisors is an integer number (29550130).

Almost surely, 2^118144687 is an apocalyptic number.

118144687 is a deficient number, since it is larger than the sum of its proper divisors (55833).

118144687 is an equidigital number, since it uses as much as digits as its factorization.

118144687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55832.

The product of its digits is 43008, while the sum is 40.

The square root of 118144687 is about 10869.4382099536. The cubic root of 118144687 is about 490.6872032078.

The spelling of 118144687 in words is "one hundred eighteen million, one hundred forty-four thousand, six hundred eighty-seven".