2065429809 has 9 divisors (see below), whose sum is σ = 2983595563. Its totient is φ = 1376862312.

The previous prime is 2065429801. The next prime is 2065429859. The reversal of 2065429809 is 9089245602.

The square root of 2065429809 is 45447.

It is a perfect power (a square), and thus also a powerful number.

2065429809 is a `hidden beast` number, since 20 + 6 + 542 + 9 + 80 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1451381409 + 614048400 = 38097^2 + 24780^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2065429809 - 2³ = 2065429801 is a prime.

It is a super-3 number, since 3×2065429809³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2065429801) 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 in 8 ways as a sum of consecutive naturals, for example, 128767 + ... + 143915.

Almost surely, 2^2065429809 is an apocalyptic number.

2065429809 is the 45447-th square number.

2065429809 is the 22724-th centered octagonal number.

It is an amenable number.

2065429809 is a deficient number, since it is larger than the sum of its proper divisors (918165754).

2065429809 is an frugal number, since it uses more digits than its factorization.

2065429809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30304 (or 15152 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The cubic root of 2065429809 is about 1273.5132862377.

The spelling of 2065429809 in words is "two billion, sixty-five million, four hundred twenty-nine thousand, eight hundred nine".