3122085709 has 4 divisors (see below), whose sum is σ = 3126003804. Its totient is φ = 3118167616.

The previous prime is 3122085691. The next prime is 3122085731. The reversal of 3122085709 is 9075802213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9075802213 = 29 ⋅312958697.

It can be written as a sum of positive squares in 2 ways, for example, as 1602801225 + 1519284484 = 40035^2 + 38978^2 .

It is a cyclic number.

It is not a de Polignac number, because 3122085709 - 2⁵ = 3122085677 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 (3122085209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1957852 + ... + 1959445.

It is an arithmetic number, because the mean of its divisors is an integer number (781500951).

Almost surely, 2^3122085709 is an apocalyptic number.

It is an amenable number.

3122085709 is a deficient number, since it is larger than the sum of its proper divisors (3918095).

3122085709 is an equidigital number, since it uses as much as digits as its factorization.

3122085709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918094.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 3122085709 is about 55875.6271463686. The cubic root of 3122085709 is about 1461.5542510314.

The spelling of 3122085709 in words is "three billion, one hundred twenty-two million, eighty-five thousand, seven hundred nine".