899009 has 2 divisors, whose sum is σ = 899010. Its totient is φ = 899008.

The previous prime is 898987. The next prime is 899051. The reversal of 899009 is 900998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 774400 + 124609 = 880^2 + 353^2 .

It is a cyclic number.

It is not a de Polignac number, because 899009 - 2⁸ = 898753 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 899009.

It is not a weakly prime, because it can be changed into another prime (899069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449504 + 449505.

It is an arithmetic number, because the mean of its divisors is an integer number (449505).

2⁸⁹⁹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

899009 is a deficient number, since it is larger than the sum of its proper divisors (1).

899009 is an equidigital number, since it uses as much as digits as its factorization.

899009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 899009 is about 948.1608513327. The cubic root of 899009 is about 96.5134884096.

The spelling of 899009 in words is "eight hundred ninety-nine thousand, nine".