1999986547579 has 2 divisors, whose sum is σ = 1999986547580. Its totient is φ = 1999986547578.

The previous prime is 1999986547547. The next prime is 1999986547609. The reversal of 1999986547579 is 9757456899991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1999986547579 - 2⁵ = 1999986547547 is a prime.

It is a super-2 number, since 2×1999986547579² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1999986547579.

It is not a weakly prime, because it can be changed into another prime (1999986547379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999993273789 + 999993273790.

It is an arithmetic number, because the mean of its divisors is an integer number (999993273790).

Almost surely, 2^{1999986547579} is an apocalyptic number.

1999986547579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999986547579 is an equidigital number, since it uses as much as digits as its factorization.

1999986547579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13888324800, while the sum is 88.

The spelling of 1999986547579 in words is "one trillion, nine hundred ninety-nine billion, nine hundred eighty-six million, five hundred forty-seven thousand, five hundred seventy-nine".