1999980133 has 2 divisors, whose sum is σ = 1999980134. Its totient is φ = 1999980132.

The previous prime is 1999980131. The next prime is 1999980137. The reversal of 1999980133 is 3310899991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1978292484 + 21687649 = 44478^2 + 4657^2 .

It is a cyclic number.

It is not a de Polignac number, because 1999980133 - 2¹ = 1999980131 is a prime.

Together with 1999980131, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1999980131) 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, 999990066 + 999990067.

It is an arithmetic number, because the mean of its divisors is an integer number (999990067).

Almost surely, 2^1999980133 is an apocalyptic number.

It is an amenable number.

1999980133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999980133 is an equidigital number, since it uses as much as digits as its factorization.

1999980133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 472392, while the sum is 52.

The square root of 1999980133 is about 44721.1374296316. The cubic root of 1999980133 is about 1259.9168780725.

The spelling of 1999980133 in words is "one billion, nine hundred ninety-nine million, nine hundred eighty thousand, one hundred thirty-three".