91043177279 has 2 divisors, whose sum is σ = 91043177280. Its totient is φ = 91043177278.

The previous prime is 91043177273. The next prime is 91043177311. The reversal of 91043177279 is 97277134019.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91043177279 - 2³⁶ = 22323700543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91043177273) 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, 45521588639 + 45521588640.

It is an arithmetic number, because the mean of its divisors is an integer number (45521588640).

Almost surely, 2^91043177279 is an apocalyptic number.

91043177279 is a deficient number, since it is larger than the sum of its proper divisors (1).

91043177279 is an equidigital number, since it uses as much as digits as its factorization.

91043177279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792, while the sum is 50.

The spelling of 91043177279 in words is "ninety-one billion, forty-three million, one hundred seventy-seven thousand, two hundred seventy-nine".