1992643879 has 2 divisors, whose sum is σ = 1992643880. Its totient is φ = 1992643878.

The previous prime is 1992643841. The next prime is 1992643883. The reversal of 1992643879 is 9783462991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1992643879 - 2¹¹ = 1992641831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1992643379) 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 as a sum of consecutive naturals, namely, 996321939 + 996321940.

It is an arithmetic number, because the mean of its divisors is an integer number (996321940).

Almost surely, 2^1992643879 is an apocalyptic number.

1992643879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992643879 is an equidigital number, since it uses as much as digits as its factorization.

1992643879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 58.

The square root of 1992643879 is about 44639.0398530255. The cubic root of 1992643879 is about 1258.3744635806.

The spelling of 1992643879 in words is "one billion, nine hundred ninety-two million, six hundred forty-three thousand, eight hundred seventy-nine".