8915971 has 4 divisors (see below), whose sum is σ = 8921944. Its totient is φ = 8910000.

The previous prime is 8915953. The next prime is 8915981. The reversal of 8915971 is 1795198.

It is a happy number.

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 8915971 - 2⁷ = 8915843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8915981) 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, 1471 + ... + 4471.

It is an arithmetic number, because the mean of its divisors is an integer number (2230486).

Almost surely, 2^8915971 is an apocalyptic number.

8915971 is a deficient number, since it is larger than the sum of its proper divisors (5973).

8915971 is a wasteful number, since it uses less digits than its factorization.

8915971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5972.

The product of its digits is 22680, while the sum is 40.

The square root of 8915971 is about 2985.9623239418. The cubic root of 8915971 is about 207.3589964776.

The spelling of 8915971 in words is "eight million, nine hundred fifteen thousand, nine hundred seventy-one".