659873 has 2 divisors, whose sum is σ = 659874. Its totient is φ = 659872.

The previous prime is 659863. The next prime is 659881. The reversal of 659873 is 378956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659344 + 529 = 812^2 + 23^2 .

It is a cyclic number.

It is not a de Polignac number, because 659873 - 2¹⁸ = 397729 is a prime.

It is a super-2 number, since 2×659873² = 870864752258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (659843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329936 + 329937.

It is an arithmetic number, because the mean of its divisors is an integer number (329937).

2⁶⁵⁹⁸⁷³ is an apocalyptic number.

It is an amenable number.

659873 is a deficient number, since it is larger than the sum of its proper divisors (1).

659873 is an equidigital number, since it uses as much as digits as its factorization.

659873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 659873 is about 812.3256736063. The cubic root of 659873 is about 87.0602920250.

The spelling of 659873 in words is "six hundred fifty-nine thousand, eight hundred seventy-three".