120744435289 has 9 divisors (see below), whose sum is σ = 123633047199. Its totient is φ = 117921830880.

The previous prime is 120744435269. The next prime is 120744435299. The reversal of 120744435289 is 982534447021.

The square root of 120744435289 is 347483.

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

It can be written as a sum of positive squares in only one way, i.e., 41175308889 + 79569126400 = 202917^2 + 282080^2 .

It is a de Polignac number, because none of the positive numbers 2^k-120744435289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120744435269) 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, 14937729 + ... + 14945809.

Almost surely, 2^120744435289 is an apocalyptic number.

120744435289 is the 347483-rd square number.

120744435289 is the 173742-nd centered octagonal number.

It is an amenable number.

120744435289 is a deficient number, since it is larger than the sum of its proper divisors (2888611910).

120744435289 is an frugal number, since it uses more digits than its factorization.

120744435289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16248 (or 8124 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

Multiplying 120744435289 by its sum of digits (49), we get a square (5916477329161 = 2432381²).

The spelling of 120744435289 in words is "one hundred twenty billion, seven hundred forty-four million, four hundred thirty-five thousand, two hundred eighty-nine".