1021444549 has 2 divisors, whose sum is σ = 1021444550. Its totient is φ = 1021444548.

The previous prime is 1021444499. The next prime is 1021444621. The reversal of 1021444549 is 9454441201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544895649 + 476548900 = 23343^2 + 21830^2 .

It is an emirp because it is prime and its reverse (9454441201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021444549 - 2¹⁷ = 1021313477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021444649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510722274 + 510722275.

It is an arithmetic number, because the mean of its divisors is an integer number (510722275).

Almost surely, 2^1021444549 is an apocalyptic number.

It is an amenable number.

1021444549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021444549 is an equidigital number, since it uses as much as digits as its factorization.

1021444549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 1021444549 is about 31960.0461357614. The cubic root of 1021444549 is about 1007.0976866570.

The spelling of 1021444549 in words is "one billion, twenty-one million, four hundred forty-four thousand, five hundred forty-nine".