996647 has 2 divisors, whose sum is σ = 996648. Its totient is φ = 996646.

The previous prime is 996637. The next prime is 996649. The reversal of 996647 is 746699.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 996647 - 2⁴ = 996631 is a prime.

Together with 996649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 996647.

It is not a weakly prime, because it can be changed into another prime (996649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498323 + 498324.

It is an arithmetic number, because the mean of its divisors is an integer number (498324).

2⁹⁹⁶⁶⁴⁷ is an apocalyptic number.

996647 is a deficient number, since it is larger than the sum of its proper divisors (1).

996647 is an equidigital number, since it uses as much as digits as its factorization.

996647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 996647 is about 998.3220923129. The cubic root of 996647 is about 99.8881081822. Note that the first 3 decimals are identical.

The spelling of 996647 in words is "nine hundred ninety-six thousand, six hundred forty-seven".