4120409309 has 2 divisors, whose sum is σ = 4120409310. Its totient is φ = 4120409308.

The previous prime is 4120409173. The next prime is 4120409333. The reversal of 4120409309 is 9039040214.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4081932100 + 38477209 = 63890^2 + 6203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4120409309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4120409009) 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, 2060204654 + 2060204655.

It is an arithmetic number, because the mean of its divisors is an integer number (2060204655).

Almost surely, 2^4120409309 is an apocalyptic number.

It is an amenable number.

4120409309 is a deficient number, since it is larger than the sum of its proper divisors (1).

4120409309 is an equidigital number, since it uses as much as digits as its factorization.

4120409309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 4120409309 is about 64190.4144635319. The cubic root of 4120409309 is about 1603.1720027860.

The spelling of 4120409309 in words is "four billion, one hundred twenty million, four hundred nine thousand, three hundred nine".