19475399497 has 2 divisors, whose sum is σ = 19475399498. Its totient is φ = 19475399496.

The previous prime is 19475399479. The next prime is 19475399509. The reversal of 19475399497 is 79499357491.

Together with previous prime (19475399479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12550496841 + 6924902656 = 112029^2 + 83216^2 .

It is a cyclic number.

It is not a de Polignac number, because 19475399497 - 2¹¹ = 19475397449 is a prime.

It is not a weakly prime, because it can be changed into another prime (19475399467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9737699748 + 9737699749.

It is an arithmetic number, because the mean of its divisors is an integer number (9737699749).

Almost surely, 2^19475399497 is an apocalyptic number.

It is an amenable number.

19475399497 is a deficient number, since it is larger than the sum of its proper divisors (1).

19475399497 is an equidigital number, since it uses as much as digits as its factorization.

19475399497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77157360, while the sum is 67.

The spelling of 19475399497 in words is "nineteen billion, four hundred seventy-five million, three hundred ninety-nine thousand, four hundred ninety-seven".