1344430621 has 2 divisors, whose sum is σ = 1344430622. Its totient is φ = 1344430620.

The previous prime is 1344430609. The next prime is 1344430673. The reversal of 1344430621 is 1260344431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1287804996 + 56625625 = 35886^2 + 7525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344430621 - 2¹⁷ = 1344299549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1344430621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344430421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672215310 + 672215311.

It is an arithmetic number, because the mean of its divisors is an integer number (672215311).

Almost surely, 2^1344430621 is an apocalyptic number.

It is an amenable number.

1344430621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344430621 is an equidigital number, since it uses as much as digits as its factorization.

1344430621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1344430621 is about 36666.4781646670. The cubic root of 1344430621 is about 1103.6875201383.

The spelling of 1344430621 in words is "one billion, three hundred forty-four million, four hundred thirty thousand, six hundred twenty-one".