545043091 has 2 divisors, whose sum is σ = 545043092. Its totient is φ = 545043090.

The previous prime is 545043089. The next prime is 545043119. The reversal of 545043091 is 190340545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 545043091 - 2¹ = 545043089 is a prime.

Together with 545043089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (545043011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272521545 + 272521546.

It is an arithmetic number, because the mean of its divisors is an integer number (272521546).

Almost surely, 2^545043091 is an apocalyptic number.

545043091 is a deficient number, since it is larger than the sum of its proper divisors (1).

545043091 is an equidigital number, since it uses as much as digits as its factorization.

545043091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 545043091 is about 23346.1579494357. The cubic root of 545043091 is about 816.8524443291.

The spelling of 545043091 in words is "five hundred forty-five million, forty-three thousand, ninety-one".