505490863 has 2 divisors, whose sum is σ = 505490864. Its totient is φ = 505490862.

The previous prime is 505490837. The next prime is 505490893. The reversal of 505490863 is 368094505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505490863 - 2¹⁷ = 505359791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505490893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252745431 + 252745432.

It is an arithmetic number, because the mean of its divisors is an integer number (252745432).

Almost surely, 2^505490863 is an apocalyptic number.

505490863 is a deficient number, since it is larger than the sum of its proper divisors (1).

505490863 is an equidigital number, since it uses as much as digits as its factorization.

505490863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 505490863 is about 22483.1239599839. The cubic root of 505490863 is about 796.5953555290.

The spelling of 505490863 in words is "five hundred five million, four hundred ninety thousand, eight hundred sixty-three".