517742143 has 2 divisors, whose sum is σ = 517742144. Its totient is φ = 517742142.

The previous prime is 517742111. The next prime is 517742171. The reversal of 517742143 is 341247715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 517742143 - 2⁵ = 517742111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 517742099 and 517742108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517742243) 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, 258871071 + 258871072.

It is an arithmetic number, because the mean of its divisors is an integer number (258871072).

Almost surely, 2^517742143 is an apocalyptic number.

517742143 is a deficient number, since it is larger than the sum of its proper divisors (1).

517742143 is an equidigital number, since it uses as much as digits as its factorization.

517742143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 34.

The square root of 517742143 is about 22753.9478552624. The cubic root of 517742143 is about 802.9795882689.

Adding to 517742143 its reverse (341247715), we get a palindrome (858989858).

The spelling of 517742143 in words is "five hundred seventeen million, seven hundred forty-two thousand, one hundred forty-three".