3123125813 has 2 divisors, whose sum is σ = 3123125814. Its totient is φ = 3123125812.

The previous prime is 3123125773. The next prime is 3123125827. The reversal of 3123125813 is 3185213213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2327773009 + 795352804 = 48247^2 + 28202^2 .

It is a cyclic number.

It is not a de Polignac number, because 3123125813 - 2¹⁸ = 3122863669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3123125833) 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, 1561562906 + 1561562907.

It is an arithmetic number, because the mean of its divisors is an integer number (1561562907).

Almost surely, 2^3123125813 is an apocalyptic number.

It is an amenable number.

3123125813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123125813 is an equidigital number, since it uses as much as digits as its factorization.

3123125813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 3123125813 is about 55884.9336852071. The cubic root of 3123125813 is about 1461.7165356689.

The spelling of 3123125813 in words is "three billion, one hundred twenty-three million, one hundred twenty-five thousand, eight hundred thirteen".