871662947 has 16 divisors (see below), whose sum is σ = 996287040. Its totient is φ = 757650432.

The previous prime is 871662907. The next prime is 871662989. The reversal of 871662947 is 749266178.

It is a cyclic number.

It is not a de Polignac number, because 871662947 - 2¹⁶ = 871597411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 871662895 and 871662904.

It is not an unprimeable number, because it can be changed into a prime (871662907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27098 + ... + 49775.

It is an arithmetic number, because the mean of its divisors is an integer number (62267940).

Almost surely, 2^871662947 is an apocalyptic number.

871662947 is a deficient number, since it is larger than the sum of its proper divisors (124624093).

871662947 is a wasteful number, since it uses less digits than its factorization.

871662947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76942.

The product of its digits is 1016064, while the sum is 50.

The square root of 871662947 is about 29523.9385414616. The cubic root of 871662947 is about 955.2481275530.

The spelling of 871662947 in words is "eight hundred seventy-one million, six hundred sixty-two thousand, nine hundred forty-seven".