865484563 has 2 divisors, whose sum is σ = 865484564. Its totient is φ = 865484562.

The previous prime is 865484519. The next prime is 865484597. The reversal of 865484563 is 365484568.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 865484563 - 2²⁹ = 328613651 is a prime.

It is not a weakly prime, because it can be changed into another prime (865484663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432742281 + 432742282.

It is an arithmetic number, because the mean of its divisors is an integer number (432742282).

Almost surely, 2^865484563 is an apocalyptic number.

865484563 is a deficient number, since it is larger than the sum of its proper divisors (1).

865484563 is an equidigital number, since it uses as much as digits as its factorization.

865484563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2764800, while the sum is 49.

The square root of 865484563 is about 29419.1190044841. The cubic root of 865484563 is about 952.9858275741.

The spelling of 865484563 in words is "eight hundred sixty-five million, four hundred eighty-four thousand, five hundred sixty-three".