3125819009 has 2 divisors, whose sum is σ = 3125819010. Its totient is φ = 3125819008.

The previous prime is 3125818981. The next prime is 3125819023. The reversal of 3125819009 is 9009185213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3103047025 + 22771984 = 55705^2 + 4772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3125819009 is a prime.

It is not a weakly prime, because it can be changed into another prime (3125819069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1562909504 + 1562909505.

It is an arithmetic number, because the mean of its divisors is an integer number (1562909505).

Almost surely, 2^3125819009 is an apocalyptic number.

It is an amenable number.

3125819009 is a deficient number, since it is larger than the sum of its proper divisors (1).

3125819009 is an equidigital number, since it uses as much as digits as its factorization.

3125819009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 3125819009 is about 55909.0243967823. The cubic root of 3125819009 is about 1462.1365804484.

The spelling of 3125819009 in words is "three billion, one hundred twenty-five million, eight hundred nineteen thousand, nine".