513684863 has 2 divisors, whose sum is σ = 513684864. Its totient is φ = 513684862.

The previous prime is 513684841. The next prime is 513684877. The reversal of 513684863 is 368486315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513684863 - 2⁶ = 513684799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513684763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256842431 + 256842432.

It is an arithmetic number, because the mean of its divisors is an integer number (256842432).

Almost surely, 2^513684863 is an apocalyptic number.

513684863 is a deficient number, since it is larger than the sum of its proper divisors (1).

513684863 is an equidigital number, since it uses as much as digits as its factorization.

513684863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The square root of 513684863 is about 22664.6169833068. The cubic root of 513684863 is about 800.8765719886.

The spelling of 513684863 in words is "five hundred thirteen million, six hundred eighty-four thousand, eight hundred sixty-three".