89009 has 2 divisors, whose sum is σ = 89010. Its totient is φ = 89008.

The previous prime is 89003. The next prime is 89017. The reversal of 89009 is 90098.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78400 + 10609 = 280^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 89009 - 2⁴ = 88993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44504 + 44505.

It is an arithmetic number, because the mean of its divisors is an integer number (44505).

2⁸⁹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

89009 is a deficient number, since it is larger than the sum of its proper divisors (1).

89009 is an equidigital number, since it uses as much as digits as its factorization.

89009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 89009 is about 298.3437614565. The cubic root of 89009 is about 44.6489558754.

Subtracting 89009 from its reverse (90098), we obtain a square (1089 = 33²).

The spelling of 89009 in words is "eighty-nine thousand, nine".