659980859 has 2 divisors, whose sum is σ = 659980860. Its totient is φ = 659980858.

The previous prime is 659980823. The next prime is 659980873. The reversal of 659980859 is 958089956.

659980859 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 659980859 - 2¹⁶ = 659915323 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 659980798 and 659980807.

It is not a weakly prime, because it can be changed into another prime (659980819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329990429 + 329990430.

It is an arithmetic number, because the mean of its divisors is an integer number (329990430).

Almost surely, 2^659980859 is an apocalyptic number.

659980859 is a deficient number, since it is larger than the sum of its proper divisors (1).

659980859 is an equidigital number, since it uses as much as digits as its factorization.

659980859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6998400, while the sum is 59.

The square root of 659980859 is about 25690.0926234220. The cubic root of 659980859 is about 870.6503522282.

The spelling of 659980859 in words is "six hundred fifty-nine million, nine hundred eighty thousand, eight hundred fifty-nine".