685725147 has 6 divisors (see below), whose sum is σ = 990491892. Its totient is φ = 457150092.

The previous prime is 685725119. The next prime is 685725179. The reversal of 685725147 is 741527586.

685725147 is a `hidden beast` number, since 68 + 5 + 72 + 514 + 7 = 666.

685725147 is nontrivially palindromic in base 5.

It is not a de Polignac number, because 685725147 - 2⁶ = 685725083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685724147) 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 5 ways as a sum of consecutive naturals, for example, 38095833 + ... + 38095850.

It is an arithmetic number, because the mean of its divisors is an integer number (165081982).

Almost surely, 2^685725147 is an apocalyptic number.

685725147 is a deficient number, since it is larger than the sum of its proper divisors (304766745).

685725147 is a wasteful number, since it uses less digits than its factorization.

685725147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76191689 (or 76191686 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 685725147 is about 26186.3542135976. The cubic root of 685725147 is about 881.8269324301.

The spelling of 685725147 in words is "six hundred eighty-five million, seven hundred twenty-five thousand, one hundred forty-seven".