993647 has 2 divisors, whose sum is σ = 993648. Its totient is φ = 993646.

The previous prime is 993617. The next prime is 993679. The reversal of 993647 is 746399.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 993647 - 2¹⁰ = 992623 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 993647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993617) 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 as a sum of consecutive naturals, namely, 496823 + 496824.

It is an arithmetic number, because the mean of its divisors is an integer number (496824).

2⁹⁹³⁶⁴⁷ is an apocalyptic number.

993647 is a deficient number, since it is larger than the sum of its proper divisors (1).

993647 is an equidigital number, since it uses as much as digits as its factorization.

993647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 993647 is about 996.8184388343. The cubic root of 993647 is about 99.7877832926.

The spelling of 993647 in words is "nine hundred ninety-three thousand, six hundred forty-seven".