118645487 has 4 divisors (see below), whose sum is σ = 118667856. Its totient is φ = 118623120.

The previous prime is 118645469. The next prime is 118645489. The reversal of 118645487 is 784546811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784546811 = 4373 ⋅179407.

It is a cyclic number.

It is not a de Polignac number, because 118645487 - 2²⁰ = 117596911 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 (118645489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1787 + ... + 15507.

It is an arithmetic number, because the mean of its divisors is an integer number (29666964).

Almost surely, 2^118645487 is an apocalyptic number.

118645487 is a deficient number, since it is larger than the sum of its proper divisors (22369).

118645487 is an equidigital number, since it uses as much as digits as its factorization.

118645487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22368.

The product of its digits is 215040, while the sum is 44.

The square root of 118645487 is about 10892.4509179523. The cubic root of 118645487 is about 491.3795456747.

The spelling of 118645487 in words is "one hundred eighteen million, six hundred forty-five thousand, four hundred eighty-seven".