159397872197 has 2 divisors, whose sum is σ = 159397872198. Its totient is φ = 159397872196.

The previous prime is 159397872181. The next prime is 159397872199. The reversal of 159397872197 is 791278793951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145043675716 + 14354196481 = 380846^2 + 119809^2 .

It is a cyclic number.

It is not a de Polignac number, because 159397872197 - 2⁴ = 159397872181 is a prime.

It is a super-2 number, since 2×159397872197² (a number of 23 digits) contains 22 as substring.

Together with 159397872199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159397872199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79698936098 + 79698936099.

It is an arithmetic number, because the mean of its divisors is an integer number (79698936099).

Almost surely, 2^159397872197 is an apocalyptic number.

It is an amenable number.

159397872197 is a deficient number, since it is larger than the sum of its proper divisors (1).

159397872197 is an equidigital number, since it uses as much as digits as its factorization.

159397872197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60011280, while the sum is 68.

The spelling of 159397872197 in words is "one hundred fifty-nine billion, three hundred ninety-seven million, eight hundred seventy-two thousand, one hundred ninety-seven".