9661971 has 24 divisors (see below), whose sum is σ = 14512960. Its totient is φ = 5710320.

The previous prime is 9661969. The next prime is 9661979. The reversal of 9661971 is 1791669.

9661971 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9661971 - 2¹ = 9661969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9661979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15300 + ... + 15918.

Almost surely, 2^9661971 is an apocalyptic number.

9661971 is a deficient number, since it is larger than the sum of its proper divisors (4850989).

9661971 is a wasteful number, since it uses less digits than its factorization.

9661971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 676 counting only the distinct ones).

The product of its digits is 20412, while the sum is 39.

The square root of 9661971 is about 3108.3711168392. The cubic root of 9661971 is about 212.9880528466.

The spelling of 9661971 in words is "nine million, six hundred sixty-one thousand, nine hundred seventy-one".