994909 has 4 divisors (see below), whose sum is σ = 1001404. Its totient is φ = 988416.

The previous prime is 994907. The next prime is 994913. The reversal of 994909 is 909499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 909499 = 179 ⋅5081.

It can be written as a sum of positive squares in 2 ways, for example, as 319225 + 675684 = 565^2 + 822^2 .

It is a cyclic number.

It is not a de Polignac number, because 994909 - 2¹ = 994907 is a prime.

It is a Duffinian number.

994909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994901) 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 in 3 ways as a sum of consecutive naturals, for example, 3012 + ... + 3325.

It is an arithmetic number, because the mean of its divisors is an integer number (250351).

2⁹⁹⁴⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

994909 is a deficient number, since it is larger than the sum of its proper divisors (6495).

994909 is a wasteful number, since it uses less digits than its factorization.

994909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6494.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 994909 is about 997.4512519417. The cubic root of 994909 is about 99.8300112018.

It can be divided in two parts, 99490 and 9, that added together give a palindrome (99499).

The spelling of 994909 in words is "nine hundred ninety-four thousand, nine hundred nine".