517023836123 has 2 divisors, whose sum is σ = 517023836124. Its totient is φ = 517023836122.

The previous prime is 517023836117. The next prime is 517023836167. The reversal of 517023836123 is 321638320715.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-517023836123 is a prime.

It is a super-2 number, since 2×517023836123² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (517023836323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258511918061 + 258511918062.

It is an arithmetic number, because the mean of its divisors is an integer number (258511918062).

Almost surely, 2^517023836123 is an apocalyptic number.

517023836123 is a deficient number, since it is larger than the sum of its proper divisors (1).

517023836123 is an equidigital number, since it uses as much as digits as its factorization.

517023836123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 517023836123 in words is "five hundred seventeen billion, twenty-three million, eight hundred thirty-six thousand, one hundred twenty-three".