1940444543 has 4 divisors (see below), whose sum is σ = 1940984640. Its totient is φ = 1939904448.

The previous prime is 1940444509. The next prime is 1940444563. The reversal of 1940444543 is 3454440491.

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 1940444543 - 2¹⁴ = 1940428159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1940444497 and 1940444506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940444503) 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, 264623 + ... + 271856.

It is an arithmetic number, because the mean of its divisors is an integer number (485246160).

Almost surely, 2^1940444543 is an apocalyptic number.

1940444543 is a deficient number, since it is larger than the sum of its proper divisors (540097).

1940444543 is an equidigital number, since it uses as much as digits as its factorization.

1940444543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540096.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 1940444543 is about 44050.4772164843. The cubic root of 1940444543 is about 1247.2889603018.

The spelling of 1940444543 in words is "one billion, nine hundred forty million, four hundred forty-four thousand, five hundred forty-three".