159561823 has 2 divisors, whose sum is σ = 159561824. Its totient is φ = 159561822.

The previous prime is 159561793. The next prime is 159561839. The reversal of 159561823 is 328165951.

159561823 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 is a cyclic number.

It is not a de Polignac number, because 159561823 - 2¹³ = 159553631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159561223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79780911 + 79780912.

It is an arithmetic number, because the mean of its divisors is an integer number (79780912).

Almost surely, 2^159561823 is an apocalyptic number.

159561823 is a deficient number, since it is larger than the sum of its proper divisors (1).

159561823 is an equidigital number, since it uses as much as digits as its factorization.

159561823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 159561823 is about 12631.7782991945. The cubic root of 159561823 is about 542.3874888253.

The spelling of 159561823 in words is "one hundred fifty-nine million, five hundred sixty-one thousand, eight hundred twenty-three".