9722641 has 2 divisors, whose sum is σ = 9722642. Its totient is φ = 9722640.

The previous prime is 9722639. The next prime is 9722659. The reversal of 9722641 is 1462279.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9431041 + 291600 = 3071^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 9722641 - 2¹ = 9722639 is a prime.

Together with 9722639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9722611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4861320 + 4861321.

It is an arithmetic number, because the mean of its divisors is an integer number (4861321).

Almost surely, 2^9722641 is an apocalyptic number.

It is an amenable number.

9722641 is a deficient number, since it is larger than the sum of its proper divisors (1).

9722641 is an equidigital number, since it uses as much as digits as its factorization.

9722641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 9722641 is about 3118.1149754299. The cubic root of 9722641 is about 213.4329252335.

The spelling of 9722641 in words is "nine million, seven hundred twenty-two thousand, six hundred forty-one".