9842656091 has 2 divisors, whose sum is σ = 9842656092. Its totient is φ = 9842656090.

The previous prime is 9842656079. The next prime is 9842656093. The reversal of 9842656091 is 1906562489.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9842656091 - 2⁶ = 9842656027 is a prime.

It is a Sophie Germain prime.

Together with 9842656093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9842656093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4921328045 + 4921328046.

It is an arithmetic number, because the mean of its divisors is an integer number (4921328046).

Almost surely, 2^9842656091 is an apocalyptic number.

9842656091 is a deficient number, since it is larger than the sum of its proper divisors (1).

9842656091 is an equidigital number, since it uses as much as digits as its factorization.

9842656091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 9842656091 is about 99210.1612285758. The cubic root of 9842656091 is about 2143.0753299977.

The spelling of 9842656091 in words is "nine billion, eight hundred forty-two million, six hundred fifty-six thousand, ninety-one".