8507971 has 4 divisors (see below), whose sum is σ = 8515192. Its totient is φ = 8500752.

The previous prime is 8507959. The next prime is 8508011. The reversal of 8507971 is 1797058.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8507971 - 2⁷ = 8507843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8507971.

It is not an unprimeable number, because it can be changed into a prime (8507911) 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, 1386 + ... + 4351.

It is an arithmetic number, because the mean of its divisors is an integer number (2128798).

Almost surely, 2^8507971 is an apocalyptic number.

8507971 is a deficient number, since it is larger than the sum of its proper divisors (7221).

8507971 is a wasteful number, since it uses less digits than its factorization.

8507971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7220.

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 8507971 is about 2916.8426423103. The cubic root of 8507971 is about 204.1465290333.

The spelling of 8507971 in words is "eight million, five hundred seven thousand, nine hundred seventy-one".