10198947378397 has 2 divisors, whose sum is σ = 10198947378398. Its totient is φ = 10198947378396.

The previous prime is 10198947378383. The next prime is 10198947378421. The reversal of 10198947378397 is 79387374989101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6876252752121 + 3322694626276 = 2622261^2 + 1822826^2 .

It is an emirp because it is prime and its reverse (79387374989101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10198947378397 - 2³⁵ = 10164587640029 is a prime.

It is a super-2 number, since 2×10198947378397² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10198947348397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5099473689198 + 5099473689199.

It is an arithmetic number, because the mean of its divisors is an integer number (5099473689199).

Almost surely, 2^{10198947378397} is an apocalyptic number.

It is an amenable number.

10198947378397 is a deficient number, since it is larger than the sum of its proper divisors (1).

10198947378397 is an equidigital number, since it uses as much as digits as its factorization.

10198947378397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576108288, while the sum is 76.

The spelling of 10198947378397 in words is "ten trillion, one hundred ninety-eight billion, nine hundred forty-seven million, three hundred seventy-eight thousand, three hundred ninety-seven".