493991543 has 2 divisors, whose sum is σ = 493991544. Its totient is φ = 493991542.

The previous prime is 493991527. The next prime is 493991557. The reversal of 493991543 is 345199394.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 493991543 - 2⁴ = 493991527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493991843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246995771 + 246995772.

It is an arithmetic number, because the mean of its divisors is an integer number (246995772).

Almost surely, 2^493991543 is an apocalyptic number.

493991543 is a deficient number, since it is larger than the sum of its proper divisors (1).

493991543 is an equidigital number, since it uses as much as digits as its factorization.

493991543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 47.

The square root of 493991543 is about 22225.9205208693. The cubic root of 493991543 is about 790.5084282568.

The spelling of 493991543 in words is "four hundred ninety-three million, nine hundred ninety-one thousand, five hundred forty-three".