685324147 has 2 divisors, whose sum is σ = 685324148. Its totient is φ = 685324146.

The previous prime is 685324121. The next prime is 685324177. The reversal of 685324147 is 741423586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 685324147 - 2⁷ = 685324019 is a prime.

It is a super-2 number, since 2×685324147² = 939338372922555218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (685324177) 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 as a sum of consecutive naturals, namely, 342662073 + 342662074.

It is an arithmetic number, because the mean of its divisors is an integer number (342662074).

Almost surely, 2^685324147 is an apocalyptic number.

685324147 is a deficient number, since it is larger than the sum of its proper divisors (1).

685324147 is an equidigital number, since it uses as much as digits as its factorization.

685324147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 40.

The square root of 685324147 is about 26178.6964343147. The cubic root of 685324147 is about 881.6550066215.

The spelling of 685324147 in words is "six hundred eighty-five million, three hundred twenty-four thousand, one hundred forty-seven".