19271399669 has 2 divisors, whose sum is σ = 19271399670. Its totient is φ = 19271399668.

The previous prime is 19271399659. The next prime is 19271399681. The reversal of 19271399669 is 96699317291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19103386225 + 168013444 = 138215^2 + 12962^2 .

It is an emirp because it is prime and its reverse (96699317291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19271399669 - 2²⁸ = 19002964213 is a prime.

It is a super-2 number, since 2×19271399669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19271399659) 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, 9635699834 + 9635699835.

It is an arithmetic number, because the mean of its divisors is an integer number (9635699835).

Almost surely, 2^19271399669 is an apocalyptic number.

It is an amenable number.

19271399669 is a deficient number, since it is larger than the sum of its proper divisors (1).

19271399669 is an equidigital number, since it uses as much as digits as its factorization.

19271399669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9920232, while the sum is 62.

The spelling of 19271399669 in words is "nineteen billion, two hundred seventy-one million, three hundred ninety-nine thousand, six hundred sixty-nine".