91351941169 has 2 divisors, whose sum is σ = 91351941170. Its totient is φ = 91351941168.

The previous prime is 91351941103. The next prime is 91351941179. The reversal of 91351941169 is 96114915319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80095792144 + 11256149025 = 283012^2 + 106095^2 .

It is a cyclic number.

It is not a de Polignac number, because 91351941169 - 2⁹ = 91351940657 is a prime.

It is a super-2 number, since 2×91351941169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91351941179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45675970584 + 45675970585.

It is an arithmetic number, because the mean of its divisors is an integer number (45675970585).

Almost surely, 2^91351941169 is an apocalyptic number.

It is an amenable number.

91351941169 is a deficient number, since it is larger than the sum of its proper divisors (1).

91351941169 is an equidigital number, since it uses as much as digits as its factorization.

91351941169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 49.

The spelling of 91351941169 in words is "ninety-one billion, three hundred fifty-one million, nine hundred forty-one thousand, one hundred sixty-nine".