89521 has 2 divisors, whose sum is σ = 89522. Its totient is φ = 89520.

The previous prime is 89519. The next prime is 89527. The reversal of 89521 is 12598.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57121 + 32400 = 239^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 89521 - 2¹ = 89519 is a prime.

Together with 89519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (89527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44760 + 44761.

It is an arithmetic number, because the mean of its divisors is an integer number (44761).

2⁸⁹⁵²¹ is an apocalyptic number.

It is an amenable number.

89521 is a deficient number, since it is larger than the sum of its proper divisors (1).

89521 is an equidigital number, since it uses as much as digits as its factorization.

89521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 89521 is about 299.2006016037. The cubic root of 89521 is about 44.7344025623.

The spelling of 89521 in words is "eighty-nine thousand, five hundred twenty-one".