2134805509 has 2 divisors, whose sum is σ = 2134805510. Its totient is φ = 2134805508.

The previous prime is 2134805479. The next prime is 2134805521. The reversal of 2134805509 is 9055084312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1679196484 + 455609025 = 40978^2 + 21345^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134805509 - 2¹⁵ = 2134772741 is a prime.

It is a super-2 number, since 2×2134805509² = 9114789122513498162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2134805009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067402754 + 1067402755.

It is an arithmetic number, because the mean of its divisors is an integer number (1067402755).

Almost surely, 2^2134805509 is an apocalyptic number.

It is an amenable number.

2134805509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2134805509 is an equidigital number, since it uses as much as digits as its factorization.

2134805509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 2134805509 is about 46203.9555557747. The cubic root of 2134805509 is about 1287.6152301303.

The spelling of 2134805509 in words is "two billion, one hundred thirty-four million, eight hundred five thousand, five hundred nine".