3118221709 has 4 divisors (see below), whose sum is σ = 3124184416. Its totient is φ = 3112259004.

The previous prime is 3118221703. The next prime is 3118221763. The reversal of 3118221709 is 9071228113.

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: 9071228113 = 331 ⋅27405523.

It is a cyclic number.

It is not a de Polignac number, because 3118221709 - 2¹⁷ = 3118090637 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 (3118221703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2980569 + ... + 2981614.

It is an arithmetic number, because the mean of its divisors is an integer number (781046104).

Almost surely, 2^3118221709 is an apocalyptic number.

It is an amenable number.

3118221709 is a deficient number, since it is larger than the sum of its proper divisors (5962707).

3118221709 is an equidigital number, since it uses as much as digits as its factorization.

3118221709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5962706.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 3118221709 is about 55841.0396482730. The cubic root of 3118221709 is about 1460.9510456126.

The spelling of 3118221709 in words is "three billion, one hundred eighteen million, two hundred twenty-one thousand, seven hundred nine".