864552859 has 2 divisors, whose sum is σ = 864552860. Its totient is φ = 864552858.

The previous prime is 864552847. The next prime is 864552863. The reversal of 864552859 is 958255468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 864552859 - 2⁹ = 864552347 is a prime.

It is not a weakly prime, because it can be changed into another prime (864552809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432276429 + 432276430.

It is an arithmetic number, because the mean of its divisors is an integer number (432276430).

Almost surely, 2^864552859 is an apocalyptic number.

864552859 is a deficient number, since it is larger than the sum of its proper divisors (1).

864552859 is an equidigital number, since it uses as much as digits as its factorization.

864552859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456000, while the sum is 52.

The square root of 864552859 is about 29403.2797320299. The cubic root of 864552859 is about 952.6437380873.

It can be divided in two parts, 8645 and 52859, that added together give a square (61504 = 248²).

The spelling of 864552859 in words is "eight hundred sixty-four million, five hundred fifty-two thousand, eight hundred fifty-nine".