523508866 has 4 divisors (see below), whose sum is σ = 785263302. Its totient is φ = 261754432.

The previous prime is 523508861. The next prime is 523508927. The reversal of 523508866 is 668805325.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 511709641 + 11799225 = 22621^2 + 3435^2 .

It is not an unprimeable number, because it can be changed into a prime (523508861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130877215 + ... + 130877218.

Almost surely, 2^523508866 is an apocalyptic number.

523508866 is a deficient number, since it is larger than the sum of its proper divisors (261754436).

523508866 is a wasteful number, since it uses less digits than its factorization.

523508866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261754435.

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 523508866 is about 22880.3161254385. The cubic root of 523508866 is about 805.9498405859.

It can be divided in two parts, 52350 and 8866, that added together give a palindrome (61216).

The spelling of 523508866 in words is "five hundred twenty-three million, five hundred eight thousand, eight hundred sixty-six".