683630221 has 2 divisors, whose sum is σ = 683630222. Its totient is φ = 683630220.

The previous prime is 683630209. The next prime is 683630239. The reversal of 683630221 is 122036386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 613305225 + 70324996 = 24765^2 + 8386^2 .

It is a cyclic number.

It is not a de Polignac number, because 683630221 - 2¹³ = 683622029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (683630201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341815110 + 341815111.

It is an arithmetic number, because the mean of its divisors is an integer number (341815111).

Almost surely, 2^683630221 is an apocalyptic number.

It is an amenable number.

683630221 is a deficient number, since it is larger than the sum of its proper divisors (1).

683630221 is an equidigital number, since it uses as much as digits as its factorization.

683630221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 683630221 is about 26146.3232788092. The cubic root of 683630221 is about 880.9280073343.

The spelling of 683630221 in words is "six hundred eighty-three million, six hundred thirty thousand, two hundred twenty-one".