159668477 has 2 divisors, whose sum is σ = 159668478. Its totient is φ = 159668476.

The previous prime is 159668449. The next prime is 159668497. The reversal of 159668477 is 774866951.

159668477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120868036 + 38800441 = 10994^2 + 6229^2 .

It is an emirp because it is prime and its reverse (774866951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159668477 - 2¹⁴ = 159652093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159668497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79834238 + 79834239.

It is an arithmetic number, because the mean of its divisors is an integer number (79834239).

Almost surely, 2^159668477 is an apocalyptic number.

It is an amenable number.

159668477 is a deficient number, since it is larger than the sum of its proper divisors (1).

159668477 is an equidigital number, since it uses as much as digits as its factorization.

159668477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The square root of 159668477 is about 12635.9992481798. Note that the first 3 decimals coincide. The cubic root of 159668477 is about 542.5083091028.

The spelling of 159668477 in words is "one hundred fifty-nine million, six hundred sixty-eight thousand, four hundred seventy-seven".