7961971 has 4 divisors (see below), whose sum is σ = 7993944. Its totient is φ = 7930000.

The previous prime is 7961959. The next prime is 7961981. The reversal of 7961971 is 1791697.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7961971 - 2⁵ = 7961939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7961951) 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, 15610 + ... + 16111.

It is an arithmetic number, because the mean of its divisors is an integer number (1998486).

Almost surely, 2^7961971 is an apocalyptic number.

7961971 is a deficient number, since it is larger than the sum of its proper divisors (31973).

7961971 is a wasteful number, since it uses less digits than its factorization.

7961971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31972.

The product of its digits is 23814, while the sum is 40.

The square root of 7961971 is about 2821.6964755267. The cubic root of 7961971 is about 199.6825881818.

The spelling of 7961971 in words is "seven million, nine hundred sixty-one thousand, nine hundred seventy-one".