545784493 has 2 divisors, whose sum is σ = 545784494. Its totient is φ = 545784492.

The previous prime is 545784487. The next prime is 545784523. The reversal of 545784493 is 394487545.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 449312809 + 96471684 = 21197^2 + 9822^2 .

It is a cyclic number.

It is not a de Polignac number, because 545784493 - 2⁹ = 545783981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545784433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272892246 + 272892247.

It is an arithmetic number, because the mean of its divisors is an integer number (272892247).

Almost surely, 2^545784493 is an apocalyptic number.

It is an amenable number.

545784493 is a deficient number, since it is larger than the sum of its proper divisors (1).

545784493 is an equidigital number, since it uses as much as digits as its factorization.

545784493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 49.

The square root of 545784493 is about 23362.0310118791. The cubic root of 545784493 is about 817.2226545958. Note that the first 3 decimals are identical.

The spelling of 545784493 in words is "five hundred forty-five million, seven hundred eighty-four thousand, four hundred ninety-three".