91050563 has 2 divisors, whose sum is σ = 91050564. Its totient is φ = 91050562.

The previous prime is 91050559. The next prime is 91050569. The reversal of 91050563 is 36505019.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91050563 - 2² = 91050559 is a prime.

It is not a weakly prime, because it can be changed into another prime (91050569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45525281 + 45525282.

It is an arithmetic number, because the mean of its divisors is an integer number (45525282).

Almost surely, 2^91050563 is an apocalyptic number.

91050563 is a deficient number, since it is larger than the sum of its proper divisors (1).

91050563 is an equidigital number, since it uses as much as digits as its factorization.

91050563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 91050563 is about 9542.0418674412. The cubic root of 91050563 is about 449.8774365801.

The spelling of 91050563 in words is "ninety-one million, fifty thousand, five hundred sixty-three".