9976000091 has 2 divisors, whose sum is σ = 9976000092. Its totient is φ = 9976000090.

The previous prime is 9976000079. The next prime is 9976000117. The reversal of 9976000091 is 1900006799.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9976000091 is a prime.

It is not a weakly prime, because it can be changed into another prime (9976000591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4988000045 + 4988000046.

It is an arithmetic number, because the mean of its divisors is an integer number (4988000046).

Almost surely, 2^9976000091 is an apocalyptic number.

9976000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

9976000091 is an equidigital number, since it uses as much as digits as its factorization.

9976000091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 9976000091 is about 99879.9283690172. The cubic root of 9976000091 is about 2152.7097681459.

The spelling of 9976000091 in words is "nine billion, nine hundred seventy-six million, ninety-one", and thus it is an aban number.