685508411 has 4 divisors (see below), whose sum is σ = 783438192. Its totient is φ = 587578632.

The previous prime is 685508387. The next prime is 685508431. The reversal of 685508411 is 114805586.

685508411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685508411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685508431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48964880 + ... + 48964893.

It is an arithmetic number, because the mean of its divisors is an integer number (195859548).

Almost surely, 2^685508411 is an apocalyptic number.

685508411 is a deficient number, since it is larger than the sum of its proper divisors (97929781).

685508411 is an equidigital number, since it uses as much as digits as its factorization.

685508411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97929780.

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 685508411 is about 26182.2155479631. The cubic root of 685508411 is about 881.7340167857.

The spelling of 685508411 in words is "six hundred eighty-five million, five hundred eight thousand, four hundred eleven".