1995823 has 4 divisors (see below), whose sum is σ = 1998760. Its totient is φ = 1992888.

The previous prime is 1995797. The next prime is 1995827. The reversal of 1995823 is 3285991.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1995823 - 2⁹ = 1995311 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 (1995827) 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 in 3 ways as a sum of consecutive naturals, for example, 136 + ... + 2002.

It is an arithmetic number, because the mean of its divisors is an integer number (499690).

2^1995823 is an apocalyptic number.

1995823 is a deficient number, since it is larger than the sum of its proper divisors (2937).

1995823 is a wasteful number, since it uses less digits than its factorization.

1995823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936.

The product of its digits is 19440, while the sum is 37.

The square root of 1995823 is about 1412.7359979841. The cubic root of 1995823 is about 125.9043323530.

The spelling of 1995823 in words is "one million, nine hundred ninety-five thousand, eight hundred twenty-three".