659930823 has 12 divisors (see below), whose sum is σ = 953559880. Its totient is φ = 439803216.

The previous prime is 659930809. The next prime is 659930861. The reversal of 659930823 is 328039956.

659930823 is a `hidden beast` number, since 6 + 599 + 30 + 8 + 23 = 666.

It is not a de Polignac number, because 659930823 - 2¹⁰ = 659929799 is a prime.

It is a super-2 number, since 2×659930823² = 871017382290914658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659930893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19488 + ... + 41226.

Almost surely, 2^659930823 is an apocalyptic number.

659930823 is a deficient number, since it is larger than the sum of its proper divisors (293629057).

659930823 is a wasteful number, since it uses less digits than its factorization.

659930823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25118 (or 25115 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 659930823 is about 25689.1187665128. The cubic root of 659930823 is about 870.6283490840.

The spelling of 659930823 in words is "six hundred fifty-nine million, nine hundred thirty thousand, eight hundred twenty-three".