108651 has 4 divisors (see below), whose sum is σ = 144872. Its totient is φ = 72432.

The previous prime is 108649. The next prime is 108677. The reversal of 108651 is 156801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156801 = 3 ⋅52267.

It is not a de Polignac number, because 108651 - 2¹ = 108649 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108631) 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, 18106 + ... + 18111.

It is an arithmetic number, because the mean of its divisors is an integer number (36218).

2¹⁰⁸⁶⁵¹ is an apocalyptic number.

108651 is a deficient number, since it is larger than the sum of its proper divisors (36221).

108651 is an equidigital number, since it uses as much as digits as its factorization.

108651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36220.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 108651 is about 329.6225113672. The cubic root of 108651 is about 47.7175249522.

The spelling of 108651 in words is "one hundred eight thousand, six hundred fifty-one".