996565 has 4 divisors (see below), whose sum is σ = 1195884. Its totient is φ = 797248.

The previous prime is 996563. The next prime is 996571. The reversal of 996565 is 565699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565699 = 479 ⋅1181.

It can be written as a sum of positive squares in 2 ways, for example, as 531441 + 465124 = 729^2 + 682^2 .

It is a cyclic number.

It is not a de Polignac number, because 996565 - 2¹ = 996563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99652 + ... + 99661.

It is an arithmetic number, because the mean of its divisors is an integer number (298971).

2⁹⁹⁶⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

996565 is a deficient number, since it is larger than the sum of its proper divisors (199319).

996565 is a wasteful number, since it uses less digits than its factorization.

996565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199318.

The product of its digits is 72900, while the sum is 40.

The square root of 996565 is about 998.2810225583. The cubic root of 996565 is about 99.8853686467.

The spelling of 996565 in words is "nine hundred ninety-six thousand, five hundred sixty-five".