1205444239973 has 2 divisors, whose sum is σ = 1205444239974. Its totient is φ = 1205444239972.

The previous prime is 1205444239927. The next prime is 1205444240003. The reversal of 1205444239973 is 3799324445021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 883566160324 + 321878079649 = 939982^2 + 567343^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205444239973 - 2⁸ = 1205444239717 is a prime.

It is a super-2 number, since 2×1205444239973² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205444239273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602722119986 + 602722119987.

It is an arithmetic number, because the mean of its divisors is an integer number (602722119987).

Almost surely, 2^{1205444239973} is an apocalyptic number.

It is an amenable number.

1205444239973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205444239973 is an equidigital number, since it uses as much as digits as its factorization.

1205444239973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 1205444239973 in words is "one trillion, two hundred five billion, four hundred forty-four million, two hundred thirty-nine thousand, nine hundred seventy-three".