13381919197 has 2 divisors, whose sum is σ = 13381919198. Its totient is φ = 13381919196.

The previous prime is 13381919077. The next prime is 13381919231. The reversal of 13381919197 is 79191918331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12130599321 + 1251319876 = 110139^2 + 35374^2 .

It is an emirp because it is prime and its reverse (79191918331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13381919197 is a prime.

It is a super-2 number, since 2×13381919197² (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 (13381919497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6690959598 + 6690959599.

It is an arithmetic number, because the mean of its divisors is an integer number (6690959599).

Almost surely, 2^13381919197 is an apocalyptic number.

It is an amenable number.

13381919197 is a deficient number, since it is larger than the sum of its proper divisors (1).

13381919197 is an equidigital number, since it uses as much as digits as its factorization.

13381919197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 52.

The spelling of 13381919197 in words is "thirteen billion, three hundred eighty-one million, nine hundred nineteen thousand, one hundred ninety-seven".