4135909 has 2 divisors, whose sum is σ = 4135910. Its totient is φ = 4135908.

The previous prime is 4135907. The next prime is 4135921. The reversal of 4135909 is 9095314.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2259009 + 1876900 = 1503^2 + 1370^2 .

It is a cyclic number.

It is not a de Polignac number, because 4135909 - 2¹ = 4135907 is a prime.

Together with 4135907, 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 (4135907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2067954 + 2067955.

It is an arithmetic number, because the mean of its divisors is an integer number (2067955).

Almost surely, 2^4135909 is an apocalyptic number.

It is an amenable number.

4135909 is a deficient number, since it is larger than the sum of its proper divisors (1).

4135909 is an equidigital number, since it uses as much as digits as its factorization.

4135909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 4135909 is about 2033.6934380580. The cubic root of 4135909 is about 160.5179697986.

The spelling of 4135909 in words is "four million, one hundred thirty-five thousand, nine hundred nine".