1992643843 has 24 divisors (see below), whose sum is σ = 2105682432. Its totient is φ = 1885089024.

The previous prime is 1992643841. The next prime is 1992643879. The reversal of 1992643843 is 3483462991.

It is not a de Polignac number, because 1992643843 - 2¹ = 1992643841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1992643841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12691921 + ... + 12692077.

It is an arithmetic number, because the mean of its divisors is an integer number (87736768).

Almost surely, 2^1992643843 is an apocalyptic number.

1992643843 is a deficient number, since it is larger than the sum of its proper divisors (113038589).

1992643843 is a wasteful number, since it uses less digits than its factorization.

1992643843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 394 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 49.

The square root of 1992643843 is about 44639.0394497910. The cubic root of 1992643843 is about 1258.3744560025.

The spelling of 1992643843 in words is "one billion, nine hundred ninety-two million, six hundred forty-three thousand, eight hundred forty-three".