684323073 has 40 divisors (see below), whose sum is σ = 1192188800. Its totient is φ = 391025880.

The previous prime is 684323051. The next prime is 684323077. The reversal of 684323073 is 370323486.

It is not a de Polignac number, because 684323073 - 2⁶ = 684323009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684323077) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15468 + ... + 40098.

It is an arithmetic number, because the mean of its divisors is an integer number (29804720).

Almost surely, 2^684323073 is an apocalyptic number.

684323073 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

684323073 is a deficient number, since it is larger than the sum of its proper divisors (507865727).

684323073 is an equidigital number, since it uses as much as digits as its factorization.

684323073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24664 (or 24641 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 684323073 is about 26159.5694345301. The cubic root of 684323073 is about 881.2255105915.

The spelling of 684323073 in words is "six hundred eighty-four million, three hundred twenty-three thousand, seventy-three".