3109705 has 4 divisors (see below), whose sum is σ = 3731652. Its totient is φ = 2487760.

The previous prime is 3109697. The next prime is 3109709. The reversal of 3109705 is 5079013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5079013 = 751 ⋅6763.

It can be written as a sum of positive squares in 2 ways, for example, as 1971216 + 1138489 = 1404^2 + 1067^2 .

It is not a de Polignac number, because 3109705 - 2³ = 3109697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3109705.

It is not an unprimeable number, because it can be changed into a prime (3109709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310966 + ... + 310975.

It is an arithmetic number, because the mean of its divisors is an integer number (932913).

Almost surely, 2^3109705 is an apocalyptic number.

It is an amenable number.

3109705 is a deficient number, since it is larger than the sum of its proper divisors (621947).

3109705 is an equidigital number, since it uses as much as digits as its factorization.

3109705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621946.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 3109705 is about 1763.4355672947. The cubic root of 3109705 is about 145.9619748349.

The spelling of 3109705 in words is "three million, one hundred nine thousand, seven hundred five".