996645 has 32 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 463104.

The previous prime is 996637. The next prime is 996647. The reversal of 996645 is 546699.

It is not a de Polignac number, because 996645 - 2³ = 996637 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a 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 in 31 ways as a sum of consecutive naturals, for example, 3571 + ... + 3839.

It is an arithmetic number, because the mean of its divisors is an integer number (56700).

2⁹⁹⁶⁶⁴⁵ is an apocalyptic number.

996645 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

996645 is a deficient number, since it is larger than the sum of its proper divisors (817755).

996645 is a wasteful number, since it uses less digits than its factorization.

996645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309.

The product of its digits is 58320, while the sum is 39.

The square root of 996645 is about 998.3210906317. The cubic root of 996645 is about 99.8880413661. Note that the first 3 decimals are identical.

It can be divided in two parts, 9966 and 45, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 996645 in words is "nine hundred ninety-six thousand, six hundred forty-five".