9651971 has 12 divisors (see below), whose sum is σ = 11889288. Its totient is φ = 7785792.

The previous prime is 9651959. The next prime is 9651977. The reversal of 9651971 is 1791569.

It is not a de Polignac number, because 9651971 - 2¹⁸ = 9389827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9651977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4961 + ... + 6626.

It is an arithmetic number, because the mean of its divisors is an integer number (990774).

Almost surely, 2^9651971 is an apocalyptic number.

9651971 is a deficient number, since it is larger than the sum of its proper divisors (2237317).

9651971 is a wasteful number, since it uses less digits than its factorization.

9651971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11618 (or 11611 counting only the distinct ones).

The product of its digits is 17010, while the sum is 38.

The square root of 9651971 is about 3106.7621408792. The cubic root of 9651971 is about 212.9145476322.

The spelling of 9651971 in words is "nine million, six hundred fifty-one thousand, nine hundred seventy-one".