1447990537729 has 4 divisors (see below), whose sum is σ = 1447992974340. Its totient is φ = 1447988101120.

The previous prime is 1447990537687. The next prime is 1447990537733. The reversal of 1447990537729 is 9277350997441.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 321097889025 + 1126892648704 = 566655^2 + 1061552^2 .

It is a cyclic number.

It is not a de Polignac number, because 1447990537729 - 2¹⁹ = 1447990013441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1447990537789) 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 in 3 ways as a sum of consecutive naturals, for example, 323457 + ... + 1732225.

It is an arithmetic number, because the mean of its divisors is an integer number (361998243585).

Almost surely, 2^{1447990537729} is an apocalyptic number.

It is an amenable number.

1447990537729 is a deficient number, since it is larger than the sum of its proper divisors (2436611).

1447990537729 is a wasteful number, since it uses less digits than its factorization.

1447990537729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436610.

The product of its (nonzero) digits is 120022560, while the sum is 67.

The spelling of 1447990537729 in words is "one trillion, four hundred forty-seven billion, nine hundred ninety million, five hundred thirty-seven thousand, seven hundred twenty-nine".