9771971 has 4 divisors (see below), whose sum is σ = 10660344. Its totient is φ = 8883600.

The previous prime is 9771967. The next prime is 9771977. The reversal of 9771971 is 1791779.

9771971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1791779 = 11 ⋅162889.

It is not a de Polignac number, because 9771971 - 2² = 9771967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9771977) 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, 444170 + ... + 444191.

It is an arithmetic number, because the mean of its divisors is an integer number (2665086).

Almost surely, 2^9771971 is an apocalyptic number.

9771971 is a deficient number, since it is larger than the sum of its proper divisors (888373).

9771971 is a wasteful number, since it uses less digits than its factorization.

9771971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888372.

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

The square root of 9771971 is about 3126.0151951006. The cubic root of 9771971 is about 213.7932830739.

The spelling of 9771971 in words is "nine million, seven hundred seventy-one thousand, nine hundred seventy-one".