685568441 has 4 divisors (see below), whose sum is σ = 707683584. Its totient is φ = 663453300.

The previous prime is 685568423. The next prime is 685568501. The reversal of 685568441 is 144865586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 685568441 - 2¹⁴ = 685552057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685568341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11057525 + ... + 11057586.

It is an arithmetic number, because the mean of its divisors is an integer number (176920896).

Almost surely, 2^685568441 is an apocalyptic number.

It is an amenable number.

685568441 is a deficient number, since it is larger than the sum of its proper divisors (22115143).

685568441 is a wasteful number, since it uses less digits than its factorization.

685568441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22115142.

The product of its digits is 921600, while the sum is 47.

The square root of 685568441 is about 26183.3619117179. The cubic root of 685568441 is about 881.7597538626.

The spelling of 685568441 in words is "six hundred eighty-five million, five hundred sixty-eight thousand, four hundred forty-one".