659579897 has 2 divisors, whose sum is σ = 659579898. Its totient is φ = 659579896.

The previous prime is 659579887. The next prime is 659579911. The reversal of 659579897 is 798975956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 432806416 + 226773481 = 20804^2 + 15059^2 .

It is a cyclic number.

It is not a de Polignac number, because 659579897 - 2¹⁰ = 659578873 is a prime.

It is not a weakly prime, because it can be changed into another prime (659579827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329789948 + 329789949.

It is an arithmetic number, because the mean of its divisors is an integer number (329789949).

Almost surely, 2^659579897 is an apocalyptic number.

It is an amenable number.

659579897 is a deficient number, since it is larger than the sum of its proper divisors (1).

659579897 is an equidigital number, since it uses as much as digits as its factorization.

659579897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42865200, while the sum is 65.

The square root of 659579897 is about 25682.2876122825. The cubic root of 659579897 is about 870.4739994233.

The spelling of 659579897 in words is "six hundred fifty-nine million, five hundred seventy-nine thousand, eight hundred ninety-seven".