517942423 has 2 divisors, whose sum is σ = 517942424. Its totient is φ = 517942422.

The previous prime is 517942421. The next prime is 517942433. The reversal of 517942423 is 324249715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 517942423 - 2¹ = 517942421 is a prime.

It is a super-2 number, since 2×517942423² = 536528707086221858, which contains 22 as substring.

Together with 517942421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517942421) 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, 258971211 + 258971212.

It is an arithmetic number, because the mean of its divisors is an integer number (258971212).

Almost surely, 2^517942423 is an apocalyptic number.

517942423 is a deficient number, since it is larger than the sum of its proper divisors (1).

517942423 is an equidigital number, since it uses as much as digits as its factorization.

517942423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 517942423 is about 22758.3484242596. The cubic root of 517942423 is about 803.0831147197.

The spelling of 517942423 in words is "five hundred seventeen million, nine hundred forty-two thousand, four hundred twenty-three".