1999893983 has 2 divisors, whose sum is σ = 1999893984. Its totient is φ = 1999893982.

The previous prime is 1999893899. The next prime is 1999893989. The reversal of 1999893983 is 3893989991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1999893983 - 2¹⁴ = 1999877599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1999893989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999946991 + 999946992.

It is an arithmetic number, because the mean of its divisors is an integer number (999946992).

Almost surely, 2^1999893983 is an apocalyptic number.

1999893983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999893983 is an equidigital number, since it uses as much as digits as its factorization.

1999893983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34012224, while the sum is 68.

The square root of 1999893983 is about 44720.1742281937. The cubic root of 1999893983 is about 1259.8987873265.

The spelling of 1999893983 in words is "one billion, nine hundred ninety-nine million, eight hundred ninety-three thousand, nine hundred eighty-three".