516654493 has 2 divisors, whose sum is σ = 516654494. Its totient is φ = 516654492.

The previous prime is 516654473. The next prime is 516654511. The reversal of 516654493 is 394456615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 446815044 + 69839449 = 21138^2 + 8357^2 .

It is a cyclic number.

It is not a de Polignac number, because 516654493 - 2⁵ = 516654461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516654443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258327246 + 258327247.

It is an arithmetic number, because the mean of its divisors is an integer number (258327247).

Almost surely, 2^516654493 is an apocalyptic number.

It is an amenable number.

516654493 is a deficient number, since it is larger than the sum of its proper divisors (1).

516654493 is an equidigital number, since it uses as much as digits as its factorization.

516654493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 43.

The square root of 516654493 is about 22730.0350417680. The cubic root of 516654493 is about 802.4169059579.

The spelling of 516654493 in words is "five hundred sixteen million, six hundred fifty-four thousand, four hundred ninety-three".