91122022169 has 2 divisors, whose sum is σ = 91122022170. Its totient is φ = 91122022168.

The previous prime is 91122022153. The next prime is 91122022177. The reversal of 91122022169 is 96122022119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89796115600 + 1325906569 = 299660^2 + 36413^2 .

It is a cyclic number.

It is not a de Polignac number, because 91122022169 - 2⁴ = 91122022153 is a prime.

It is a super-2 number, since 2×91122022169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91122022469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45561011084 + 45561011085.

It is an arithmetic number, because the mean of its divisors is an integer number (45561011085).

Almost surely, 2^91122022169 is an apocalyptic number.

It is an amenable number.

91122022169 is a deficient number, since it is larger than the sum of its proper divisors (1).

91122022169 is an equidigital number, since it uses as much as digits as its factorization.

91122022169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 91122022169 in words is "ninety-one billion, one hundred twenty-two million, twenty-two thousand, one hundred sixty-nine".