685706147 has 24 divisors (see below), whose sum is σ = 808980480. Its totient is φ = 579474000.

The previous prime is 685706141. The next prime is 685706149. The reversal of 685706147 is 741607586.

It is not a de Polignac number, because 685706147 - 2¹⁰ = 685705123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685706098 and 685706107.

It is not an unprimeable number, because it can be changed into a prime (685706141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1561754 + ... + 1562192.

It is an arithmetic number, because the mean of its divisors is an integer number (33707520).

Almost surely, 2^685706147 is an apocalyptic number.

685706147 is a deficient number, since it is larger than the sum of its proper divisors (123274333).

685706147 is a wasteful number, since it uses less digits than its factorization.

685706147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 685706147 is about 26185.9914267152. The cubic root of 685706147 is about 881.8187878323.

The spelling of 685706147 in words is "six hundred eighty-five million, seven hundred six thousand, one hundred forty-seven".