9621971 has 2 divisors, whose sum is σ = 9621972. Its totient is φ = 9621970.

The previous prime is 9621959. The next prime is 9621977. The reversal of 9621971 is 1791269.

9621971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1791269) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9621971 - 2⁶ = 9621907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9621977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4810985 + 4810986.

It is an arithmetic number, because the mean of its divisors is an integer number (4810986).

Almost surely, 2^9621971 is an apocalyptic number.

9621971 is a deficient number, since it is larger than the sum of its proper divisors (1).

9621971 is an equidigital number, since it uses as much as digits as its factorization.

9621971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 35.

The square root of 9621971 is about 3101.9302055333. The cubic root of 9621971 is about 212.6937269096.

The spelling of 9621971 in words is "nine million, six hundred twenty-one thousand, nine hundred seventy-one".