684860163 has 12 divisors (see below), whose sum is σ = 988792920. Its totient is φ = 421452096.

The previous prime is 684860161. The next prime is 684860179. The reversal of 684860163 is 361068486.

It is a happy number.

It is not a de Polignac number, because 684860163 - 2¹ = 684860161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684860161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 674898 + ... + 675911.

It is an arithmetic number, because the mean of its divisors is an integer number (82399410).

Almost surely, 2^684860163 is an apocalyptic number.

684860163 is a deficient number, since it is larger than the sum of its proper divisors (303932757).

684860163 is a wasteful number, since it uses less digits than its factorization.

684860163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350838 (or 1350825 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 684860163 is about 26169.8330716877. The cubic root of 684860163 is about 881.4559931710.

The spelling of 684860163 in words is "six hundred eighty-four million, eight hundred sixty thousand, one hundred sixty-three".