996649 has 2 divisors, whose sum is σ = 996650. Its totient is φ = 996648.

The previous prime is 996647. The next prime is 996689. The reversal of 996649 is 946699.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 739600 + 257049 = 860^2 + 507^2 .

It is a cyclic number.

It is not a de Polignac number, because 996649 - 2¹ = 996647 is a prime.

Together with 996647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (996647) 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, 498324 + 498325.

It is an arithmetic number, because the mean of its divisors is an integer number (498325).

2⁹⁹⁶⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

996649 is a deficient number, since it is larger than the sum of its proper divisors (1).

996649 is an equidigital number, since it uses as much as digits as its factorization.

996649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 43.

The square root of 996649 is about 998.3230939931. The cubic root of 996649 is about 99.8881749983. Note that the first 3 decimals are identical.

The spelling of 996649 in words is "nine hundred ninety-six thousand, six hundred forty-nine".