994823609 has 4 divisors (see below), whose sum is σ = 1071348516. Its totient is φ = 918298704.

The previous prime is 994823593. The next prime is 994823611. The reversal of 994823609 is 906328499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906328499 = 2843 ⋅318793.

It can be written as a sum of positive squares in 2 ways, for example, as 675844009 + 318979600 = 25997^2 + 17860^2 .

It is a cyclic number.

It is not a de Polignac number, because 994823609 - 2⁴ = 994823593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994829609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38262434 + ... + 38262459.

It is an arithmetic number, because the mean of its divisors is an integer number (267837129).

Almost surely, 2^994823609 is an apocalyptic number.

It is an amenable number.

994823609 is a deficient number, since it is larger than the sum of its proper divisors (76524907).

994823609 is a wasteful number, since it uses less digits than its factorization.

994823609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76524906.

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 994823609 is about 31540.8244819313. The cubic root of 994823609 is about 998.2715505170.

The spelling of 994823609 in words is "nine hundred ninety-four million, eight hundred twenty-three thousand, six hundred nine".