980909 has 2 divisors, whose sum is σ = 980910. Its totient is φ = 980908.

The previous prime is 980899. The next prime is 980911. The reversal of 980909 is 909089.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 896809 + 84100 = 947^2 + 290^2 .

It is an emirp because it is prime and its reverse (909089) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 980909 - 2⁴ = 980893 is a prime.

It is a Sophie Germain prime.

Together with 980911, it forms a pair of twin primes.

It is a Chen prime.

980909 is a modest number, since divided by 909 gives 98 as remainder.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 980909.

It is not a weakly prime, because it can be changed into another prime (980999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490454 + 490455.

It is an arithmetic number, because the mean of its divisors is an integer number (490455).

2⁹⁸⁰⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

980909 is a deficient number, since it is larger than the sum of its proper divisors (1).

980909 is an equidigital number, since it uses as much as digits as its factorization.

980909 is an odious number, because the sum of its binary digits is odd.

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

The square root of 980909 is about 990.4085015790. The cubic root of 980909 is about 99.3595402028.

The spelling of 980909 in words is "nine hundred eighty thousand, nine hundred nine".