683430221 has 2 divisors, whose sum is σ = 683430222. Its totient is φ = 683430220.

The previous prime is 683430203. The next prime is 683430259. The reversal of 683430221 is 122034386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666207721 + 17222500 = 25811^2 + 4150^2 .

It is a cyclic number.

It is not a de Polignac number, because 683430221 - 2⁶ = 683430157 is a prime.

It is a super-4 number, since 4×683430221⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (683438221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341715110 + 341715111.

It is an arithmetic number, because the mean of its divisors is an integer number (341715111).

Almost surely, 2^683430221 is an apocalyptic number.

It is an amenable number.

683430221 is a deficient number, since it is larger than the sum of its proper divisors (1).

683430221 is an equidigital number, since it uses as much as digits as its factorization.

683430221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 683430221 is about 26142.4983695132. The cubic root of 683430221 is about 880.8420920835.

The spelling of 683430221 in words is "six hundred eighty-three million, four hundred thirty thousand, two hundred twenty-one".