545963809 has 2 divisors, whose sum is σ = 545963810. Its totient is φ = 545963808.

The previous prime is 545963807. The next prime is 545963837. The reversal of 545963809 is 908369545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329785600 + 216178209 = 18160^2 + 14703^2 .

It is a cyclic number.

It is not a de Polignac number, because 545963809 - 2¹ = 545963807 is a prime.

Together with 545963807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (545963807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272981904 + 272981905.

It is an arithmetic number, because the mean of its divisors is an integer number (272981905).

Almost surely, 2^545963809 is an apocalyptic number.

It is an amenable number.

545963809 is a deficient number, since it is larger than the sum of its proper divisors (1).

545963809 is an equidigital number, since it uses as much as digits as its factorization.

545963809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The square root of 545963809 is about 23365.8684623534. The cubic root of 545963809 is about 817.3121435509.

The spelling of 545963809 in words is "five hundred forty-five million, nine hundred sixty-three thousand, eight hundred nine".