89208521 has 2 divisors, whose sum is σ = 89208522. Its totient is φ = 89208520.

The previous prime is 89208473. The next prime is 89208523. The reversal of 89208521 is 12580298.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51998521 + 37210000 = 7211^2 + 6100^2 .

It is a cyclic number.

It is not a de Polignac number, because 89208521 - 2¹⁰ = 89207497 is a prime.

Together with 89208523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89208523) 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, 44604260 + 44604261.

It is an arithmetic number, because the mean of its divisors is an integer number (44604261).

Almost surely, 2^89208521 is an apocalyptic number.

It is an amenable number.

89208521 is a deficient number, since it is larger than the sum of its proper divisors (1).

89208521 is an equidigital number, since it uses as much as digits as its factorization.

89208521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 89208521 is about 9445.0262572425. The cubic root of 89208521 is about 446.8229241548.

The spelling of 89208521 in words is "eighty-nine million, two hundred eight thousand, five hundred twenty-one".