7917971 has 8 divisors (see below), whose sum is σ = 8436960. Its totient is φ = 7404928.

The previous prime is 7917967. The next prime is 7917997. The reversal of 7917971 is 1797197.

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

It is not a de Polignac number, because 7917971 - 2² = 7917967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7917071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1445 + ... + 4233.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^7917971 is an apocalyptic number.

7917971 is a deficient number, since it is larger than the sum of its proper divisors (518989).

7917971 is a wasteful number, since it uses less digits than its factorization.

7917971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973.

The product of its digits is 27783, while the sum is 41.

The square root of 7917971 is about 2813.8889459252. Note that the first 3 decimals coincide. The cubic root of 7917971 is about 199.3140752254.

It can be divided in two parts, 7917 and 971, that added together give a palindrome (8888).

The spelling of 7917971 in words is "seven million, nine hundred seventeen thousand, nine hundred seventy-one".