545391289 has 2 divisors, whose sum is σ = 545391290. Its totient is φ = 545391288.

The previous prime is 545391281. The next prime is 545391299. The reversal of 545391289 is 982193545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 505890064 + 39501225 = 22492^2 + 6285^2 .

It is a cyclic number.

It is not a de Polignac number, because 545391289 - 2³ = 545391281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (545391281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272695644 + 272695645.

It is an arithmetic number, because the mean of its divisors is an integer number (272695645).

Almost surely, 2^545391289 is an apocalyptic number.

It is an amenable number.

545391289 is a deficient number, since it is larger than the sum of its proper divisors (1).

545391289 is an equidigital number, since it uses as much as digits as its factorization.

545391289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 46.

The square root of 545391289 is about 23353.6140457960. The cubic root of 545391289 is about 817.0263546404.

The spelling of 545391289 in words is "five hundred forty-five million, three hundred ninety-one thousand, two hundred eighty-nine".