996839 has 4 divisors (see below), whose sum is σ = 999456. Its totient is φ = 994224.

The previous prime is 996811. The next prime is 996841. The reversal of 996839 is 938699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 938699 = 23 ⋅40813.

It is a cyclic number.

It is not a de Polignac number, because 996839 - 2¹⁶ = 931303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 996839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996859) 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, 614 + ... + 1539.

It is an arithmetic number, because the mean of its divisors is an integer number (249864).

2⁹⁹⁶⁸³⁹ is an apocalyptic number.

996839 is a deficient number, since it is larger than the sum of its proper divisors (2617).

996839 is a wasteful number, since it uses less digits than its factorization.

996839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616.

The product of its digits is 104976, while the sum is 44.

The square root of 996839 is about 998.4182490319. The cubic root of 996839 is about 99.8945221166.

The spelling of 996839 in words is "nine hundred ninety-six thousand, eight hundred thirty-nine".