996609 has 4 divisors (see below), whose sum is σ = 1328816. Its totient is φ = 664404.

The previous prime is 996601. The next prime is 996617. The reversal of 996609 is 906699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (996601) and next prime (996617).

It is not a de Polignac number, because 996609 - 2³ = 996601 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 996609.

It is not an unprimeable number, because it can be changed into a prime (996601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166099 + ... + 166104.

It is an arithmetic number, because the mean of its divisors is an integer number (332204).

2⁹⁹⁶⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

996609 is a deficient number, since it is larger than the sum of its proper divisors (332207).

996609 is a wasteful number, since it uses less digits than its factorization.

996609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332206.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 996609 is about 998.3030601977. The cubic root of 996609 is about 99.8868386601.

The spelling of 996609 in words is "nine hundred ninety-six thousand, six hundred nine".