10889561 has 2 divisors, whose sum is σ = 10889562. Its totient is φ = 10889560.

The previous prime is 10889551. The next prime is 10889573. The reversal of 10889561 is 16598801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10523536 + 366025 = 3244^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 10889561 - 2²² = 6695257 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10889521) 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, 5444780 + 5444781.

It is an arithmetic number, because the mean of its divisors is an integer number (5444781).

Almost surely, 2^10889561 is an apocalyptic number.

It is an amenable number.

10889561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10889561 is an equidigital number, since it uses as much as digits as its factorization.

10889561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 10889561 is about 3299.9334841781. The cubic root of 10889561 is about 221.6512189535.

The spelling of 10889561 in words is "ten million, eight hundred eighty-nine thousand, five hundred sixty-one".