659603081 has 2 divisors, whose sum is σ = 659603082. Its totient is φ = 659603080.

The previous prime is 659603051. The next prime is 659603137. The reversal of 659603081 is 180306956.

659603081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605947456 + 53655625 = 24616^2 + 7325^2 .

It is a cyclic number.

It is not a de Polignac number, because 659603081 - 2²² = 655408777 is a prime.

It is a super-2 number, since 2×659603081² = 870152448929385122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (659603011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329801540 + 329801541.

It is an arithmetic number, because the mean of its divisors is an integer number (329801541).

Almost surely, 2^659603081 is an apocalyptic number.

It is an amenable number.

659603081 is a deficient number, since it is larger than the sum of its proper divisors (1).

659603081 is an equidigital number, since it uses as much as digits as its factorization.

659603081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 659603081 is about 25682.7389699775. The cubic root of 659603081 is about 870.4841982549.

The spelling of 659603081 in words is "six hundred fifty-nine million, six hundred three thousand, eighty-one".