2065240909 has 4 divisors (see below), whose sum is σ = 2155034016. Its totient is φ = 1975447804.

The previous prime is 2065240907. The next prime is 2065240913. The reversal of 2065240909 is 9090425602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9090425602 = 2 ⋅4545212801.

It is a cyclic number.

It is not a de Polignac number, because 2065240909 - 2¹ = 2065240907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2065240907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44896519 + ... + 44896564.

It is an arithmetic number, because the mean of its divisors is an integer number (538758504).

Almost surely, 2^2065240909 is an apocalyptic number.

It is an amenable number.

2065240909 is a deficient number, since it is larger than the sum of its proper divisors (89793107).

2065240909 is an equidigital number, since it uses as much as digits as its factorization.

2065240909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89793106.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 2065240909 is about 45444.9217074911. The cubic root of 2065240909 is about 1273.4744607443.

The spelling of 2065240909 in words is "two billion, sixty-five million, two hundred forty thousand, nine hundred nine".