1920443 has 4 divisors (see below), whose sum is σ = 2194800. Its totient is φ = 1646088.

The previous prime is 1920437. The next prime is 1920469. The reversal of 1920443 is 3440291.

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

It is a cyclic number.

It is not a de Polignac number, because 1920443 - 2⁴ = 1920427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1920403) 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, 137168 + ... + 137181.

It is an arithmetic number, because the mean of its divisors is an integer number (548700).

2^1920443 is an apocalyptic number.

1920443 is a deficient number, since it is larger than the sum of its proper divisors (274357).

1920443 is an equidigital number, since it uses as much as digits as its factorization.

1920443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274356.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1920443 is about 1385.8004906912. The cubic root of 1920443 is about 124.2988585586.

The spelling of 1920443 in words is "one million, nine hundred twenty thousand, four hundred forty-three".