996623 has 4 divisors (see below), whose sum is σ = 1001880. Its totient is φ = 991368.

The previous prime is 996617. The next prime is 996629. The reversal of 996623 is 326699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326699 = 383 ⋅853.

It is an interprime number because it is at equal distance from previous prime (996617) and next prime (996629).

It is a cyclic number.

It is not a de Polignac number, because 996623 - 2⁸ = 996367 is a prime.

It is a Duffinian number.

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 996623.

It is not an unprimeable number, because it can be changed into a prime (996629) 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, 2333 + ... + 2726.

It is an arithmetic number, because the mean of its divisors is an integer number (250470).

2⁹⁹⁶⁶²³ is an apocalyptic number.

996623 is a deficient number, since it is larger than the sum of its proper divisors (5257).

996623 is a wasteful number, since it uses less digits than its factorization.

996623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256.

The product of its digits is 17496, while the sum is 35.

The square root of 996623 is about 998.3100720718. The cubic root of 996623 is about 99.8873063825.

The spelling of 996623 in words is "nine hundred ninety-six thousand, six hundred twenty-three".