19900000297 has 2 divisors, whose sum is σ = 19900000298. Its totient is φ = 19900000296.

The previous prime is 19900000279. The next prime is 19900000313. The reversal of 19900000297 is 79200000991.

Together with previous prime (19900000279) 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., 18341014041 + 1558986256 = 135429^2 + 39484^2 .

It is an emirp because it is prime and its reverse (79200000991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19900000297 is a prime.

It is not a weakly prime, because it can be changed into another prime (19900000217) 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, 9950000148 + 9950000149.

It is an arithmetic number, because the mean of its divisors is an integer number (9950000149).

Almost surely, 2^19900000297 is an apocalyptic number.

It is an amenable number.

19900000297 is a deficient number, since it is larger than the sum of its proper divisors (1).

19900000297 is an equidigital number, since it uses as much as digits as its factorization.

19900000297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 37.

The spelling of 19900000297 in words is "nineteen billion, nine hundred million, two hundred ninety-seven", and thus it is an aban number.