91229773841 has 2 divisors, whose sum is σ = 91229773842. Its totient is φ = 91229773840.

The previous prime is 91229773829. The next prime is 91229773849. The reversal of 91229773841 is 14837792219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55705440400 + 35524333441 = 236020^2 + 188479^2 .

It is a cyclic number.

It is not a de Polignac number, because 91229773841 - 2¹⁰ = 91229772817 is a prime.

It is not a weakly prime, because it can be changed into another prime (91229773849) 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, 45614886920 + 45614886921.

It is an arithmetic number, because the mean of its divisors is an integer number (45614886921).

Almost surely, 2^91229773841 is an apocalyptic number.

It is an amenable number.

91229773841 is a deficient number, since it is larger than the sum of its proper divisors (1).

91229773841 is an equidigital number, since it uses as much as digits as its factorization.

91229773841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 53.

The spelling of 91229773841 in words is "ninety-one billion, two hundred twenty-nine million, seven hundred seventy-three thousand, eight hundred forty-one".