159278549 has 2 divisors, whose sum is σ = 159278550. Its totient is φ = 159278548.

The previous prime is 159278533. The next prime is 159278551. The reversal of 159278549 is 945872951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155800324 + 3478225 = 12482^2 + 1865^2 .

It is an emirp because it is prime and its reverse (945872951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159278549 - 2⁴ = 159278533 is a prime.

Together with 159278551, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 159278497 and 159278506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159178549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79639274 + 79639275.

It is an arithmetic number, because the mean of its divisors is an integer number (79639275).

Almost surely, 2^159278549 is an apocalyptic number.

It is an amenable number.

159278549 is a deficient number, since it is larger than the sum of its proper divisors (1).

159278549 is an equidigital number, since it uses as much as digits as its factorization.

159278549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 50.

The square root of 159278549 is about 12620.5605659971. The cubic root of 159278549 is about 542.0663274447.

The spelling of 159278549 in words is "one hundred fifty-nine million, two hundred seventy-eight thousand, five hundred forty-nine".