108863987 has 4 divisors (see below), whose sum is σ = 108922296. Its totient is φ = 108805680.

The previous prime is 108863983. The next prime is 108864001. The reversal of 108863987 is 789368801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789368801 = 13 ⋅60720677.

It is a cyclic number.

It is not a de Polignac number, because 108863987 - 2² = 108863983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108863981) 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, 26258 + ... + 30119.

It is an arithmetic number, because the mean of its divisors is an integer number (27230574).

Almost surely, 2^108863987 is an apocalyptic number.

108863987 is a deficient number, since it is larger than the sum of its proper divisors (58309).

108863987 is an equidigital number, since it uses as much as digits as its factorization.

108863987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58308.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 108863987 is about 10433.7906342805. The cubic root of 108863987 is about 477.4868459412.

The spelling of 108863987 in words is "one hundred eight million, eight hundred sixty-three thousand, nine hundred eighty-seven".