1009399 has 2 divisors, whose sum is σ = 1009400. Its totient is φ = 1009398.

The previous prime is 1009387. The next prime is 1009417. The reversal of 1009399 is 9939001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1009399 is a prime.

1009399 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1009399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1009319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504699 + 504700.

It is an arithmetic number, because the mean of its divisors is an integer number (504700).

2^1009399 is an apocalyptic number.

1009399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009399 is an equidigital number, since it uses as much as digits as its factorization.

1009399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 1009399 is about 1004.6885089420. The cubic root of 1009399 is about 100.3123235246.

The spelling of 1009399 in words is "one million, nine thousand, three hundred ninety-nine".