3997732321489 has 9 divisors (see below), whose sum is σ = 4003484955249. Its totient is φ = 3991987950480.

The previous prime is 3997732321441. The next prime is 3997732321493. The reversal of 3997732321489 is 9841232377993.

The square root of 3997732321489 is 1999433.

It is a perfect power (a square), and thus also a powerful number.

3997732321489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 531462870225 + 3466269451264 = 729015^2 + 1861792^2 .

It is not a de Polignac number, because 3997732321489 - 2⁹ = 3997732320977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3997732321439) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2361329527 + ... + 2361331219.

Almost surely, 2^{3997732321489} is an apocalyptic number.

3997732321489 is the 1999433-rd square number.

3997732321489 is the 999717-th centered octagonal number.

It is an amenable number.

3997732321489 is a deficient number, since it is larger than the sum of its proper divisors (5752633760).

3997732321489 is an frugal number, since it uses more digits than its factorization.

3997732321489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5748 (or 2874 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 67.

The spelling of 3997732321489 in words is "three trillion, nine hundred ninety-seven billion, seven hundred thirty-two million, three hundred twenty-one thousand, four hundred eighty-nine".