545299681 has 2 divisors, whose sum is σ = 545299682. Its totient is φ = 545299680.

The previous prime is 545299649. The next prime is 545299717. The reversal of 545299681 is 186992545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311699025 + 233600656 = 17655^2 + 15284^2 .

It is a cyclic number.

It is not a de Polignac number, because 545299681 - 2⁵ = 545299649 is a prime.

It is a super-3 number, since 3×545299681³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (545299481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272649840 + 272649841.

It is an arithmetic number, because the mean of its divisors is an integer number (272649841).

Almost surely, 2^545299681 is an apocalyptic number.

It is an amenable number.

545299681 is a deficient number, since it is larger than the sum of its proper divisors (1).

545299681 is an equidigital number, since it uses as much as digits as its factorization.

545299681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 49.

The square root of 545299681 is about 23351.6526395885. The cubic root of 545299681 is about 816.9806074598.

The spelling of 545299681 in words is "five hundred forty-five million, two hundred ninety-nine thousand, six hundred eighty-one".