91127563 has 2 divisors, whose sum is σ = 91127564. Its totient is φ = 91127562.

The previous prime is 91127557. The next prime is 91127567. The reversal of 91127563 is 36572119.

It is a strong prime.

It is an emirp because it is prime and its reverse (36572119) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91127563 is a prime.

It is not a weakly prime, because it can be changed into another prime (91127567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45563781 + 45563782.

It is an arithmetic number, because the mean of its divisors is an integer number (45563782).

Almost surely, 2^91127563 is an apocalyptic number.

91127563 is a deficient number, since it is larger than the sum of its proper divisors (1).

91127563 is an equidigital number, since it uses as much as digits as its factorization.

91127563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 34.

The square root of 91127563 is about 9546.0757906063. The cubic root of 91127563 is about 450.0042188905.

The spelling of 91127563 in words is "ninety-one million, one hundred twenty-seven thousand, five hundred sixty-three".