1999713673213 has 2 divisors, whose sum is σ = 1999713673214. Its totient is φ = 1999713673212.

The previous prime is 1999713673201. The next prime is 1999713673219. The reversal of 1999713673213 is 3123763179991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1308125175289 + 691588497924 = 1143733^2 + 831618^2 .

It is a cyclic number.

It is not a de Polignac number, because 1999713673213 - 2³³ = 1991123738621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1999713673219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999856836606 + 999856836607.

It is an arithmetic number, because the mean of its divisors is an integer number (999856836607).

Almost surely, 2^{1999713673213} is an apocalyptic number.

It is an amenable number.

1999713673213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999713673213 is an equidigital number, since it uses as much as digits as its factorization.

1999713673213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11573604, while the sum is 61.

The spelling of 1999713673213 in words is "one trillion, nine hundred ninety-nine billion, seven hundred thirteen million, six hundred seventy-three thousand, two hundred thirteen".