1941686221 has 2 divisors, whose sum is σ = 1941686222. Its totient is φ = 1941686220.

The previous prime is 1941686207. The next prime is 1941686237. The reversal of 1941686221 is 1226861491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1939081225 + 2604996 = 44035^2 + 1614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1941686221 - 2²⁹ = 1404815309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1941686251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970843110 + 970843111.

It is an arithmetic number, because the mean of its divisors is an integer number (970843111).

Almost surely, 2^1941686221 is an apocalyptic number.

It is an amenable number.

1941686221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1941686221 is an equidigital number, since it uses as much as digits as its factorization.

1941686221 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1941686221 is about 44064.5687712929. The cubic root of 1941686221 is about 1247.5549476402.

The spelling of 1941686221 in words is "one billion, nine hundred forty-one million, six hundred eighty-six thousand, two hundred twenty-one".