3123009949 has 2 divisors, whose sum is σ = 3123009950. Its totient is φ = 3123009948.

The previous prime is 3123009947. The next prime is 3123009961. The reversal of 3123009949 is 9499003213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3093361924 + 29648025 = 55618^2 + 5445^2 .

It is a cyclic number.

It is not a de Polignac number, because 3123009949 - 2¹ = 3123009947 is a prime.

It is a super-2 number, since 2×3123009949² = 19506382283105965202, which contains 22 as substring.

Together with 3123009947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3123009947) 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 as a sum of consecutive naturals, namely, 1561504974 + 1561504975.

It is an arithmetic number, because the mean of its divisors is an integer number (1561504975).

Almost surely, 2^3123009949 is an apocalyptic number.

It is an amenable number.

3123009949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123009949 is an equidigital number, since it uses as much as digits as its factorization.

3123009949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 3123009949 is about 55883.8970455712. The cubic root of 3123009949 is about 1461.6984595032.

The spelling of 3123009949 in words is "three billion, one hundred twenty-three million, nine thousand, nine hundred forty-nine".