10889521 has 2 divisors, whose sum is σ = 10889522. Its totient is φ = 10889520.

The previous prime is 10889513. The next prime is 10889551. The reversal of 10889521 is 12598801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7507600 + 3381921 = 2740^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 10889521 - 2³ = 10889513 is a prime.

It is equal to p₇₁₉₆₈₃ and since 10889521 and 719683 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (10889551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5444760 + 5444761.

It is an arithmetic number, because the mean of its divisors is an integer number (5444761).

Almost surely, 2^10889521 is an apocalyptic number.

It is an amenable number.

10889521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10889521 is an equidigital number, since it uses as much as digits as its factorization.

10889521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 10889521 is about 3299.9274234443. The cubic root of 10889521 is about 221.6509475603.

It can be divided in two parts, 1088 and 9521, that added together give a square (10609 = 103²).

The spelling of 10889521 in words is "ten million, eight hundred eighty-nine thousand, five hundred twenty-one".