9623820091 has 2 divisors, whose sum is σ = 9623820092. Its totient is φ = 9623820090.

The previous prime is 9623820007. The next prime is 9623820113. The reversal of 9623820091 is 1900283269.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9623820091 - 2⁷ = 9623819963 is a prime.

It is not a weakly prime, because it can be changed into another prime (9623820991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4811910045 + 4811910046.

It is an arithmetic number, because the mean of its divisors is an integer number (4811910046).

Almost surely, 2^9623820091 is an apocalyptic number.

9623820091 is a deficient number, since it is larger than the sum of its proper divisors (1).

9623820091 is an equidigital number, since it uses as much as digits as its factorization.

9623820091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 9623820091 is about 98101.0707943598. The cubic root of 9623820091 is about 2127.0735075946.

The spelling of 9623820091 in words is "nine billion, six hundred twenty-three million, eight hundred twenty thousand, ninety-one".