971906771 has 4 divisors (see below), whose sum is σ = 1060261944. Its totient is φ = 883551600.

The previous prime is 971906759. The next prime is 971906777. The reversal of 971906771 is 177609179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177609179 = 11 ⋅16146289.

It is a cyclic number.

It is not a de Polignac number, because 971906771 - 2¹⁰ = 971905747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971906777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44177570 + ... + 44177591.

It is an arithmetic number, because the mean of its divisors is an integer number (265065486).

Almost surely, 2^971906771 is an apocalyptic number.

971906771 is a deficient number, since it is larger than the sum of its proper divisors (88355173).

971906771 is a wasteful number, since it uses less digits than its factorization.

971906771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88355172.

The product of its (nonzero) digits is 166698, while the sum is 47.

The square root of 971906771 is about 31175.4193396015. The cubic root of 971906771 is about 990.5465033497.

The spelling of 971906771 in words is "nine hundred seventy-one million, nine hundred six thousand, seven hundred seventy-one".