91267980091 has 2 divisors, whose sum is σ = 91267980092. Its totient is φ = 91267980090.

The previous prime is 91267980049. The next prime is 91267980101. The reversal of 91267980091 is 19008976219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91267980091 - 2⁷ = 91267979963 is a prime.

It is not a weakly prime, because it can be changed into another prime (91267980191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45633990045 + 45633990046.

It is an arithmetic number, because the mean of its divisors is an integer number (45633990046).

Almost surely, 2^91267980091 is an apocalyptic number.

91267980091 is a deficient number, since it is larger than the sum of its proper divisors (1).

91267980091 is an equidigital number, since it uses as much as digits as its factorization.

91267980091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 52.

The spelling of 91267980091 in words is "ninety-one billion, two hundred sixty-seven million, nine hundred eighty thousand, ninety-one".