871297705 has 8 divisors (see below), whose sum is σ = 1059880392. Its totient is φ = 687489408.

The previous prime is 871297699. The next prime is 871297717. The reversal of 871297705 is 507792178.

It can be written as a sum of positive squares in 4 ways, for example, as 1106704 + 870191001 = 1052^2 + 29499^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 871297705 - 2¹³ = 871289513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1193194 + ... + 1193923.

It is an arithmetic number, because the mean of its divisors is an integer number (132485049).

Almost surely, 2^871297705 is an apocalyptic number.

It is an amenable number.

871297705 is a deficient number, since it is larger than the sum of its proper divisors (188582687).

871297705 is a wasteful number, since it uses less digits than its factorization.

871297705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387195.

The product of its (nonzero) digits is 246960, while the sum is 46.

The square root of 871297705 is about 29517.7523703957. The cubic root of 871297705 is about 955.1146870297.

The spelling of 871297705 in words is "eight hundred seventy-one million, two hundred ninety-seven thousand, seven hundred five".