1671996979013 has 2 divisors, whose sum is σ = 1671996979014. Its totient is φ = 1671996979012.

The previous prime is 1671996978979. The next prime is 1671996979027. The reversal of 1671996979013 is 3109796991761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1427073938404 + 244923040609 = 1194602^2 + 494897^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671996979013 - 2²⁴ = 1671980201797 is a prime.

It is a super-3 number, since 3×1671996979013³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671906979013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835998489506 + 835998489507.

It is an arithmetic number, because the mean of its divisors is an integer number (835998489507).

Almost surely, 2^{1671996979013} is an apocalyptic number.

It is an amenable number.

1671996979013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671996979013 is an equidigital number, since it uses as much as digits as its factorization.

1671996979013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34720812, while the sum is 68.

The spelling of 1671996979013 in words is "one trillion, six hundred seventy-one billion, nine hundred ninety-six million, nine hundred seventy-nine thousand, thirteen".