108611309 has 4 divisors (see below), whose sum is σ = 108633216. Its totient is φ = 108589404.

The previous prime is 108611297. The next prime is 108611311. The reversal of 108611309 is 903116801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 903116801 = 3461 ⋅260941.

It is a cyclic number.

It is not a de Polignac number, because 108611309 - 2⁸ = 108611053 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 (108611339) 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, 422 + ... + 14744.

It is an arithmetic number, because the mean of its divisors is an integer number (27158304).

Almost surely, 2^108611309 is an apocalyptic number.

It is an amenable number.

108611309 is a deficient number, since it is larger than the sum of its proper divisors (21907).

108611309 is an equidigital number, since it uses as much as digits as its factorization.

108611309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21906.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 108611309 is about 10421.6749613486. The cubic root of 108611309 is about 477.1171372491.

The spelling of 108611309 in words is "one hundred eight million, six hundred eleven thousand, three hundred nine".