996689 has 2 divisors, whose sum is σ = 996690. Its totient is φ = 996688.

The previous prime is 996649. The next prime is 996703. The reversal of 996689 is 986699.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 824464 + 172225 = 908^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 996689 - 2¹⁶ = 931153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (996629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498344 + 498345.

It is an arithmetic number, because the mean of its divisors is an integer number (498345).

2⁹⁹⁶⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

996689 is a deficient number, since it is larger than the sum of its proper divisors (1).

996689 is an equidigital number, since it uses as much as digits as its factorization.

996689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 47.

The square root of 996689 is about 998.3431273866. The cubic root of 996689 is about 99.8895113008.

The spelling of 996689 in words is "nine hundred ninety-six thousand, six hundred eighty-nine".