108688669 has 4 divisors (see below), whose sum is σ = 109909980. Its totient is φ = 107467360.

The previous prime is 108688661. The next prime is 108688703. The reversal of 108688669 is 966886801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 966886801 = 19 ⋅50888779.

It can be written as a sum of positive squares in 2 ways, for example, as 76912900 + 31775769 = 8770^2 + 5637^2 .

It is a cyclic number.

It is not a de Polignac number, because 108688669 - 2³ = 108688661 is a prime.

It is a super-2 number, since 2×108688669² = 23626453537983122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108688661) 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, 610522 + ... + 610699.

It is an arithmetic number, because the mean of its divisors is an integer number (27477495).

Almost surely, 2^108688669 is an apocalyptic number.

It is an amenable number.

108688669 is a deficient number, since it is larger than the sum of its proper divisors (1221311).

108688669 is an equidigital number, since it uses as much as digits as its factorization.

108688669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221310.

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 108688669 is about 10425.3857962188. The cubic root of 108688669 is about 477.2303882612.

The spelling of 108688669 in words is "one hundred eight million, six hundred eighty-eight thousand, six hundred sixty-nine".