108981687 has 8 divisors (see below), whose sum is σ = 149236336. Its totient is φ = 70690752.

The previous prime is 108981629. The next prime is 108981703. The reversal of 108981687 is 786189801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 108981687 - 2⁷ = 108981559 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 (108981287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490798 + ... + 491019.

It is an arithmetic number, because the mean of its divisors is an integer number (18654542).

Almost surely, 2^108981687 is an apocalyptic number.

108981687 is a deficient number, since it is larger than the sum of its proper divisors (40254649).

108981687 is an equidigital number, since it uses as much as digits as its factorization.

108981687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981857.

The product of its (nonzero) digits is 193536, while the sum is 48.

The square root of 108981687 is about 10439.4294384320. The cubic root of 108981687 is about 477.6588647498.

The spelling of 108981687 in words is "one hundred eight million, nine hundred eighty-one thousand, six hundred eighty-seven".