3123113209 has 2 divisors, whose sum is σ = 3123113210. Its totient is φ = 3123113208.

The previous prime is 3123113207. The next prime is 3123113233. The reversal of 3123113209 is 9023113213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3080250000 + 42863209 = 55500^2 + 6547^2 .

It is an emirp because it is prime and its reverse (9023113213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3123113209 - 2¹ = 3123113207 is a prime.

It is a super-2 number, since 2×3123113209² = 19507672232460555362, which contains 22 as substring.

Together with 3123113207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3123113207) 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 as a sum of consecutive naturals, namely, 1561556604 + 1561556605.

It is an arithmetic number, because the mean of its divisors is an integer number (1561556605).

Almost surely, 2^3123113209 is an apocalyptic number.

It is an amenable number.

3123113209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123113209 is an equidigital number, since it uses as much as digits as its factorization.

3123113209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 3123113209 is about 55884.8209176696. The cubic root of 3123113209 is about 1461.7145693163.

The spelling of 3123113209 in words is "three billion, one hundred twenty-three million, one hundred thirteen thousand, two hundred nine".