159775949 has 2 divisors, whose sum is σ = 159775950. Its totient is φ = 159775948.

The previous prime is 159775943. The next prime is 159775951. The reversal of 159775949 is 949577951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145974724 + 13801225 = 12082^2 + 3715^2 .

It is a cyclic number.

It is not a de Polignac number, because 159775949 - 2⁴ = 159775933 is a prime.

Together with 159775951, 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 = 159775894 and 159775903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159775943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79887974 + 79887975.

It is an arithmetic number, because the mean of its divisors is an integer number (79887975).

Almost surely, 2^159775949 is an apocalyptic number.

It is an amenable number.

159775949 is a deficient number, since it is larger than the sum of its proper divisors (1).

159775949 is an equidigital number, since it uses as much as digits as its factorization.

159775949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3572100, while the sum is 56.

The square root of 159775949 is about 12640.2511446569. The cubic root of 159775949 is about 542.6300016195.

The spelling of 159775949 in words is "one hundred fifty-nine million, seven hundred seventy-five thousand, nine hundred forty-nine".