864805705 has 4 divisors (see below), whose sum is σ = 1037766852. Its totient is φ = 691844560.

The previous prime is 864805703. The next prime is 864805741. The reversal of 864805705 is 507508468.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 389391289 + 475414416 = 19733^2 + 21804^2 .

It is not a de Polignac number, because 864805705 - 2¹ = 864805703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864805703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86480566 + ... + 86480575.

It is an arithmetic number, because the mean of its divisors is an integer number (259441713).

Almost surely, 2^864805705 is an apocalyptic number.

It is an amenable number.

864805705 is a deficient number, since it is larger than the sum of its proper divisors (172961147).

864805705 is a wasteful number, since it uses less digits than its factorization.

864805705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172961146.

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 864805705 is about 29407.5790401046. The cubic root of 864805705 is about 952.7365986831.

The spelling of 864805705 in words is "eight hundred sixty-four million, eight hundred five thousand, seven hundred five".