1996243 has 4 divisors (see below), whose sum is σ = 2015728. Its totient is φ = 1976760.

The previous prime is 1996237. The next prime is 1996277. The reversal of 1996243 is 3426991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1996243 is a prime.

It is a super-2 number, since 2×1996243² = 7969972230098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1996199 and 1996208.

It is not an unprimeable number, because it can be changed into a prime (1996223) 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, 9588 + ... + 9793.

It is an arithmetic number, because the mean of its divisors is an integer number (503932).

2^1996243 is an apocalyptic number.

1996243 is a deficient number, since it is larger than the sum of its proper divisors (19485).

1996243 is a wasteful number, since it uses less digits than its factorization.

1996243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19484.

The product of its digits is 11664, while the sum is 34.

The square root of 1996243 is about 1412.8846378951. The cubic root of 1996243 is about 125.9131634819.

The spelling of 1996243 in words is "one million, nine hundred ninety-six thousand, two hundred forty-three".