684498123 has 48 divisors (see below), whose sum is σ = 1074810880. Its totient is φ = 418364352.

The previous prime is 684498071. The next prime is 684498131. The reversal of 684498123 is 321894486.

It is a happy number.

684498123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 684498123 - 2¹⁴ = 684481739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684498163) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 933465 + ... + 934197.

Almost surely, 2^684498123 is an apocalyptic number.

684498123 is a deficient number, since it is larger than the sum of its proper divisors (390312757).

684498123 is a wasteful number, since it uses less digits than its factorization.

684498123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928 (or 925 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 684498123 is about 26162.9150325418. The cubic root of 684498123 is about 881.3006434152.

The spelling of 684498123 in words is "six hundred eighty-four million, four hundred ninety-eight thousand, one hundred twenty-three".