864585679 has 2 divisors, whose sum is σ = 864585680. Its totient is φ = 864585678.

The previous prime is 864585641. The next prime is 864585719. The reversal of 864585679 is 976585468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 864585679 - 2⁷ = 864585551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864585619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432292839 + 432292840.

It is an arithmetic number, because the mean of its divisors is an integer number (432292840).

Almost surely, 2^864585679 is an apocalyptic number.

864585679 is a deficient number, since it is larger than the sum of its proper divisors (1).

864585679 is an equidigital number, since it uses as much as digits as its factorization.

864585679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14515200, while the sum is 58.

The square root of 864585679 is about 29403.8378277394. The cubic root of 864585679 is about 952.6557926315.

The spelling of 864585679 in words is "eight hundred sixty-four million, five hundred eighty-five thousand, six hundred seventy-nine".