91109667001 has 2 divisors, whose sum is σ = 91109667002. Its totient is φ = 91109667000.

The previous prime is 91109666993. The next prime is 91109667029. The reversal of 91109667001 is 10076690119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58903775401 + 32205891600 = 242701^2 + 179460^2 .

It is a cyclic number.

It is not a de Polignac number, because 91109667001 - 2³ = 91109666993 is a prime.

It is not a weakly prime, because it can be changed into another prime (91109667071) 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, 45554833500 + 45554833501.

It is an arithmetic number, because the mean of its divisors is an integer number (45554833501).

Almost surely, 2^91109667001 is an apocalyptic number.

It is an amenable number.

91109667001 is a deficient number, since it is larger than the sum of its proper divisors (1).

91109667001 is an equidigital number, since it uses as much as digits as its factorization.

91109667001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 40.

The spelling of 91109667001 in words is "ninety-one billion, one hundred nine million, six hundred sixty-seven thousand, one".