9655861 has 2 divisors, whose sum is σ = 9655862. Its totient is φ = 9655860.

The previous prime is 9655859. The next prime is 9655889. The reversal of 9655861 is 1685569.

9655861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7873636 + 1782225 = 2806^2 + 1335^2 .

It is a cyclic number.

It is not a de Polignac number, because 9655861 - 2¹ = 9655859 is a prime.

Together with 9655859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9655801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4827930 + 4827931.

It is an arithmetic number, because the mean of its divisors is an integer number (4827931).

Almost surely, 2^9655861 is an apocalyptic number.

It is an amenable number.

9655861 is a deficient number, since it is larger than the sum of its proper divisors (1).

9655861 is an equidigital number, since it uses as much as digits as its factorization.

9655861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 9655861 is about 3107.3881315343. The cubic root of 9655861 is about 212.9431471914.

The spelling of 9655861 in words is "nine million, six hundred fifty-five thousand, eight hundred sixty-one".