13642344197 has 2 divisors, whose sum is σ = 13642344198. Its totient is φ = 13642344196.

The previous prime is 13642344187. The next prime is 13642344239. The reversal of 13642344197 is 79144324631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10716183361 + 2926160836 = 103519^2 + 54094^2 .

It is an emirp because it is prime and its reverse (79144324631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13642344197 - 2⁴ = 13642344181 is a prime.

It is a super-2 number, since 2×13642344197² (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 (13642344167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6821172098 + 6821172099.

It is an arithmetic number, because the mean of its divisors is an integer number (6821172099).

Almost surely, 2^13642344197 is an apocalyptic number.

It is an amenable number.

13642344197 is a deficient number, since it is larger than the sum of its proper divisors (1).

13642344197 is an equidigital number, since it uses as much as digits as its factorization.

13642344197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 44.

The spelling of 13642344197 in words is "thirteen billion, six hundred forty-two million, three hundred forty-four thousand, one hundred ninety-seven".