545481493 has 2 divisors, whose sum is σ = 545481494. Its totient is φ = 545481492.

The previous prime is 545481479. The next prime is 545481527. The reversal of 545481493 is 394184545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428365809 + 117115684 = 20697^2 + 10822^2 .

It is a cyclic number.

It is not a de Polignac number, because 545481493 - 2²¹ = 543384341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545481463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272740746 + 272740747.

It is an arithmetic number, because the mean of its divisors is an integer number (272740747).

Almost surely, 2^545481493 is an apocalyptic number.

It is an amenable number.

545481493 is a deficient number, since it is larger than the sum of its proper divisors (1).

545481493 is an equidigital number, since it uses as much as digits as its factorization.

545481493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 43.

The square root of 545481493 is about 23355.5452302018. The cubic root of 545481493 is about 817.0713956864.

The spelling of 545481493 in words is "five hundred forty-five million, four hundred eighty-one thousand, four hundred ninety-three".