108839645 has 4 divisors (see below), whose sum is σ = 130607580. Its totient is φ = 87071712.

The previous prime is 108839629. The next prime is 108839683. The reversal of 108839645 is 546938801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546938801 = 43 ⋅12719507.

It can be written as a sum of positive squares in 2 ways, for example, as 79049881 + 29789764 = 8891^2 + 5458^2 .

It is a cyclic number.

It is not a de Polignac number, because 108839645 - 2⁴ = 108839629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 108839596 and 108839605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10883960 + ... + 10883969.

It is an arithmetic number, because the mean of its divisors is an integer number (32651895).

Almost surely, 2^108839645 is an apocalyptic number.

It is an amenable number.

108839645 is a deficient number, since it is larger than the sum of its proper divisors (21767935).

108839645 is an equidigital number, since it uses as much as digits as its factorization.

108839645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21767934.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 108839645 is about 10432.6240706737. The cubic root of 108839645 is about 477.4512545838.

The spelling of 108839645 in words is "one hundred eight million, eight hundred thirty-nine thousand, six hundred forty-five".