159911212397 has 2 divisors, whose sum is σ = 159911212398. Its totient is φ = 159911212396.

The previous prime is 159911212367. The next prime is 159911212441. The reversal of 159911212397 is 793212119951.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159908812996 + 2399401 = 399886^2 + 1549^2 .

It is an emirp because it is prime and its reverse (793212119951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159911212397 - 2¹⁰ = 159911211373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159911212367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79955606198 + 79955606199.

It is an arithmetic number, because the mean of its divisors is an integer number (79955606199).

Almost surely, 2^159911212397 is an apocalyptic number.

It is an amenable number.

159911212397 is a deficient number, since it is larger than the sum of its proper divisors (1).

159911212397 is an equidigital number, since it uses as much as digits as its factorization.

159911212397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 50.

The spelling of 159911212397 in words is "one hundred fifty-nine billion, nine hundred eleven million, two hundred twelve thousand, three hundred ninety-seven".