8129971 has 8 divisors (see below), whose sum is σ = 8547840. Its totient is φ = 7717512.

The previous prime is 8129963. The next prime is 8129999. The reversal of 8129971 is 1799218.

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

It is not a de Polignac number, because 8129971 - 2³ = 8129963 is a prime.

It is an Ulam number.

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 8129971.

It is not an unprimeable number, because it can be changed into a prime (8129921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1926 + ... + 4468.

It is an arithmetic number, because the mean of its divisors is an integer number (1068480).

Almost surely, 2^8129971 is an apocalyptic number.

8129971 is a deficient number, since it is larger than the sum of its proper divisors (417869).

8129971 is a wasteful number, since it uses less digits than its factorization.

8129971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705.

The product of its digits is 9072, while the sum is 37.

The square root of 8129971 is about 2851.3104005001. The cubic root of 8129971 is about 201.0772786023.

The spelling of 8129971 in words is "eight million, one hundred twenty-nine thousand, nine hundred seventy-one".