996819 has 4 divisors (see below), whose sum is σ = 1329096. Its totient is φ = 664544.

The previous prime is 996811. The next prime is 996841. The reversal of 996819 is 918699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 996819 - 2³ = 996811 is a prime.

It is a super-2 number, since 2×996819² = 1987296237522, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (996811) 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, 166134 + ... + 166139.

It is an arithmetic number, because the mean of its divisors is an integer number (332274).

2⁹⁹⁶⁸¹⁹ is an apocalyptic number.

996819 is a deficient number, since it is larger than the sum of its proper divisors (332277).

996819 is a wasteful number, since it uses less digits than its factorization.

996819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332276.

The product of its digits is 34992, while the sum is 42.

The square root of 996819 is about 998.4082331391. The cubic root of 996819 is about 99.8938540369.

The spelling of 996819 in words is "nine hundred ninety-six thousand, eight hundred nineteen".