3845090009 has 2 divisors, whose sum is σ = 3845090010. Its totient is φ = 3845090008.

The previous prime is 3845089981. The next prime is 3845090017. The reversal of 3845090009 is 9000905483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3050131984 + 794958025 = 55228^2 + 28195^2 .

It is a cyclic number.

It is not a de Polignac number, because 3845090009 - 2¹⁶ = 3845024473 is a prime.

It is not a weakly prime, because it can be changed into another prime (3845090089) 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, 1922545004 + 1922545005.

It is an arithmetic number, because the mean of its divisors is an integer number (1922545005).

Almost surely, 2^3845090009 is an apocalyptic number.

It is an amenable number.

3845090009 is a deficient number, since it is larger than the sum of its proper divisors (1).

3845090009 is an equidigital number, since it uses as much as digits as its factorization.

3845090009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 3845090009 is about 62008.7897720960. The cubic root of 3845090009 is about 1566.6386506886.

The spelling of 3845090009 in words is "three billion, eight hundred forty-five million, ninety thousand, nine".