159800161 has 2 divisors, whose sum is σ = 159800162. Its totient is φ = 159800160.

The previous prime is 159800131. The next prime is 159800177. The reversal of 159800161 is 161008951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150307600 + 9492561 = 12260^2 + 3081^2 .

It is a cyclic number.

It is not a de Polignac number, because 159800161 - 2⁹ = 159799649 is a prime.

It is not a weakly prime, because it can be changed into another prime (159800131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79900080 + 79900081.

It is an arithmetic number, because the mean of its divisors is an integer number (79900081).

Almost surely, 2^159800161 is an apocalyptic number.

It is an amenable number.

159800161 is a deficient number, since it is larger than the sum of its proper divisors (1).

159800161 is an equidigital number, since it uses as much as digits as its factorization.

159800161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 159800161 is about 12641.2088425119. The cubic root of 159800161 is about 542.6574097788.

The spelling of 159800161 in words is "one hundred fifty-nine million, eight hundred thousand, one hundred sixty-one".