1922121349 has 2 divisors, whose sum is σ = 1922121350. Its totient is φ = 1922121348.

The previous prime is 1922121343. The next prime is 1922121379. The reversal of 1922121349 is 9431212291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1134477124 + 787644225 = 33682^2 + 28065^2 .

It is a cyclic number.

It is not a de Polignac number, because 1922121349 - 2¹¹ = 1922119301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1922121343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961060674 + 961060675.

It is an arithmetic number, because the mean of its divisors is an integer number (961060675).

Almost surely, 2^1922121349 is an apocalyptic number.

It is an amenable number.

1922121349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1922121349 is an equidigital number, since it uses as much as digits as its factorization.

1922121349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 1922121349 is about 43842.0043907666. The cubic root of 1922121349 is about 1243.3505786640.

The spelling of 1922121349 in words is "one billion, nine hundred twenty-two million, one hundred twenty-one thousand, three hundred forty-nine".