3619808221 has 2 divisors, whose sum is σ = 3619808222. Its totient is φ = 3619808220.

The previous prime is 3619808189. The next prime is 3619808239. The reversal of 3619808221 is 1228089163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2670305625 + 949502596 = 51675^2 + 30814^2 .

It is a cyclic number.

It is not a de Polignac number, because 3619808221 - 2⁵ = 3619808189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3619808251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1809904110 + 1809904111.

It is an arithmetic number, because the mean of its divisors is an integer number (1809904111).

Almost surely, 2^3619808221 is an apocalyptic number.

It is an amenable number.

3619808221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3619808221 is an equidigital number, since it uses as much as digits as its factorization.

3619808221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 3619808221 is about 60164.8420674400. The cubic root of 3619808221 is about 1535.4246927957.

The spelling of 3619808221 in words is "three billion, six hundred nineteen million, eight hundred eight thousand, two hundred twenty-one".