108708521 has 4 divisors (see below), whose sum is σ = 108735492. Its totient is φ = 108681552.

The previous prime is 108708499. The next prime is 108708533. The reversal of 108708521 is 125807801.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21752896 + 86955625 = 4664^2 + 9325^2 .

It is a cyclic number.

It is not a de Polignac number, because 108708521 - 2¹⁰ = 108707497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108708581) 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, 6086 + ... + 15951.

It is an arithmetic number, because the mean of its divisors is an integer number (27183873).

Almost surely, 2^108708521 is an apocalyptic number.

It is an amenable number.

108708521 is a deficient number, since it is larger than the sum of its proper divisors (26971).

108708521 is an equidigital number, since it uses as much as digits as its factorization.

108708521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26970.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 108708521 is about 10426.3378518059. The cubic root of 108708521 is about 477.2594418906.

It can be divided in two parts, 10870 and 8521, that added together give a palindrome (19391).

The spelling of 108708521 in words is "one hundred eight million, seven hundred eight thousand, five hundred twenty-one".