9100561 has 2 divisors, whose sum is σ = 9100562. Its totient is φ = 9100560.

The previous prime is 9100547. The next prime is 9100583. The reversal of 9100561 is 1650019.

It is an a-pointer prime, because the next prime (9100583) can be obtained adding 9100561 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8410000 + 690561 = 2900^2 + 831^2 .

It is a cyclic number.

It is not a de Polignac number, because 9100561 - 2¹¹ = 9098513 is a prime.

It is not a weakly prime, because it can be changed into another prime (9100501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4550280 + 4550281.

It is an arithmetic number, because the mean of its divisors is an integer number (4550281).

Almost surely, 2^9100561 is an apocalyptic number.

It is an amenable number.

9100561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9100561 is an equidigital number, since it uses as much as digits as its factorization.

9100561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 9100561 is about 3016.7136092112. The cubic root of 9100561 is about 208.7802380092.

The spelling of 9100561 in words is "nine million, one hundred thousand, five hundred sixty-one".