659609161 has 2 divisors, whose sum is σ = 659609162. Its totient is φ = 659609160.

The previous prime is 659609131. The next prime is 659609173. The reversal of 659609161 is 161906956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 579846400 + 79762761 = 24080^2 + 8931^2 .

It is a cyclic number.

It is not a de Polignac number, because 659609161 - 2⁷ = 659609033 is a prime.

It is not a weakly prime, because it can be changed into another prime (659609131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329804580 + 329804581.

It is an arithmetic number, because the mean of its divisors is an integer number (329804581).

Almost surely, 2^659609161 is an apocalyptic number.

It is an amenable number.

659609161 is a deficient number, since it is larger than the sum of its proper divisors (1).

659609161 is an equidigital number, since it uses as much as digits as its factorization.

659609161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 659609161 is about 25682.8573371422. The cubic root of 659609161 is about 870.4868728571.

The spelling of 659609161 in words is "six hundred fifty-nine million, six hundred nine thousand, one hundred sixty-one".