1920289943 has 16 divisors (see below), whose sum is σ = 2292999072. Its totient is φ = 1585008000.

The previous prime is 1920289939. The next prime is 1920289957. The reversal of 1920289943 is 3499820291.

It is a cyclic number.

It is not a de Polignac number, because 1920289943 - 2² = 1920289939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920289913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101348 + ... + 118793.

It is an arithmetic number, because the mean of its divisors is an integer number (143312442).

Almost surely, 2^1920289943 is an apocalyptic number.

1920289943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1920289943 is a deficient number, since it is larger than the sum of its proper divisors (372709129).

1920289943 is a wasteful number, since it uses less digits than its factorization.

1920289943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220226.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 1920289943 is about 43821.1129822144. The cubic root of 1920289943 is about 1242.9555631432.

The spelling of 1920289943 in words is "one billion, nine hundred twenty million, two hundred eighty-nine thousand, nine hundred forty-three".