684148573 has 2 divisors, whose sum is σ = 684148574. Its totient is φ = 684148572.

The previous prime is 684148559. The next prime is 684148603. The reversal of 684148573 is 375841486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631919044 + 52229529 = 25138^2 + 7227^2 .

It is a cyclic number.

It is not a de Polignac number, because 684148573 - 2²⁵ = 650594141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684148513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342074286 + 342074287.

It is an arithmetic number, because the mean of its divisors is an integer number (342074287).

Almost surely, 2^684148573 is an apocalyptic number.

It is an amenable number.

684148573 is a deficient number, since it is larger than the sum of its proper divisors (1).

684148573 is an equidigital number, since it uses as much as digits as its factorization.

684148573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 46.

The square root of 684148573 is about 26156.2339223368. The cubic root of 684148573 is about 881.1506010787.

The spelling of 684148573 in words is "six hundred eighty-four million, one hundred forty-eight thousand, five hundred seventy-three".