1441999921 has 2 divisors, whose sum is σ = 1441999922. Its totient is φ = 1441999920.

The previous prime is 1441999907. The next prime is 1441999957. The reversal of 1441999921 is 1299991441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1426119696 + 15880225 = 37764^2 + 3985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1441999921 - 2¹¹ = 1441997873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1441999901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720999960 + 720999961.

It is an arithmetic number, because the mean of its divisors is an integer number (720999961).

Almost surely, 2^1441999921 is an apocalyptic number.

It is an amenable number.

1441999921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1441999921 is an equidigital number, since it uses as much as digits as its factorization.

1441999921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 49.

The square root of 1441999921 is about 37973.6740519007. The cubic root of 1441999921 is about 1129.7657699702.

The spelling of 1441999921 in words is "one billion, four hundred forty-one million, nine hundred ninety-nine thousand, nine hundred twenty-one".