871617906 has 12 divisors (see below), whose sum is σ = 1888505502. Its totient is φ = 290539296.

The previous prime is 871617889. The next prime is 871617911. The reversal of 871617906 is 609716178.

It can be written as a sum of positive squares in only one way, i.e., 582787881 + 288830025 = 24141^2 + 16995^2 .

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 5 ways as a sum of consecutive naturals, for example, 24211591 + ... + 24211626.

Almost surely, 2^871617906 is an apocalyptic number.

871617906 is an abundant number, since it is smaller than the sum of its proper divisors (1016887596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

871617906 is a wasteful number, since it uses less digits than its factorization.

871617906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48423225 (or 48423222 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 871617906 is about 29523.1757438118. The cubic root of 871617906 is about 955.2316739179.

The spelling of 871617906 in words is "eight hundred seventy-one million, six hundred seventeen thousand, nine hundred six".