545321893 has 2 divisors, whose sum is σ = 545321894. Its totient is φ = 545321892.

The previous prime is 545321891. The next prime is 545321939. The reversal of 545321893 is 398123545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 442765764 + 102556129 = 21042^2 + 10127^2 .

It is a cyclic number.

It is not a de Polignac number, because 545321893 - 2¹ = 545321891 is a prime.

Together with 545321891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545321891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272660946 + 272660947.

It is an arithmetic number, because the mean of its divisors is an integer number (272660947).

Almost surely, 2^545321893 is an apocalyptic number.

It is an amenable number.

545321893 is a deficient number, since it is larger than the sum of its proper divisors (1).

545321893 is an equidigital number, since it uses as much as digits as its factorization.

545321893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 545321893 is about 23352.1282327757. The cubic root of 545321893 is about 816.9917001534.

The spelling of 545321893 in words is "five hundred forty-five million, three hundred twenty-one thousand, eight hundred ninety-three".