864552847 has 2 divisors, whose sum is σ = 864552848. Its totient is φ = 864552846.

The previous prime is 864552823. The next prime is 864552859. The reversal of 864552847 is 748255468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 864552847 - 2⁷ = 864552719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864552847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864552047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432276423 + 432276424.

It is an arithmetic number, because the mean of its divisors is an integer number (432276424).

Almost surely, 2^864552847 is an apocalyptic number.

864552847 is a deficient number, since it is larger than the sum of its proper divisors (1).

864552847 is an equidigital number, since it uses as much as digits as its factorization.

864552847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2150400, while the sum is 49.

The square root of 864552847 is about 29403.2795279710. The cubic root of 864552847 is about 952.6437336798.

The spelling of 864552847 in words is "eight hundred sixty-four million, five hundred fifty-two thousand, eight hundred forty-seven".