8821971 has 6 divisors (see below), whose sum is σ = 12742860. Its totient is φ = 5881308.

The previous prime is 8821961. The next prime is 8821973. The reversal of 8821971 is 1791288.

8821971 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8821971 - 2¹⁰ = 8820947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8821973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 490101 + ... + 490118.

It is an arithmetic number, because the mean of its divisors is an integer number (2123810).

Almost surely, 2^8821971 is an apocalyptic number.

8821971 is a deficient number, since it is larger than the sum of its proper divisors (3920889).

8821971 is a wasteful number, since it uses less digits than its factorization.

8821971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980225 (or 980222 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 8821971 is about 2970.1802975577. The cubic root of 8821971 is about 206.6277001919.

The spelling of 8821971 in words is "eight million, eight hundred twenty-one thousand, nine hundred seventy-one".