899309 has 2 divisors, whose sum is σ = 899310. Its totient is φ = 899308.

The previous prime is 899291. The next prime is 899321. The reversal of 899309 is 903998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 896809 + 2500 = 947^2 + 50^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-899309 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899009) 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, 449654 + 449655.

It is an arithmetic number, because the mean of its divisors is an integer number (449655).

2⁸⁹⁹³⁰⁹ is an apocalyptic number.

It is an amenable number.

899309 is a deficient number, since it is larger than the sum of its proper divisors (1).

899309 is an equidigital number, since it uses as much as digits as its factorization.

899309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 899309 is about 948.3190391424. The cubic root of 899309 is about 96.5242227576.

The spelling of 899309 in words is "eight hundred ninety-nine thousand, three hundred nine".