9973721232 has 30 divisors (see below), whose sum is σ = 27912567462. Its totient is φ = 3324573696.

The previous prime is 9973721203. The next prime is 9973721239. The reversal of 9973721232 is 2321273799.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8031027456 + 1942693776 = 89616^2 + 44076^2 .

It is not an unprimeable number, because it can be changed into a prime (9973721239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34630833 + ... + 34631120.

Almost surely, 2^9973721232 is an apocalyptic number.

It is an amenable number.

9973721232 is an abundant number, since it is smaller than the sum of its proper divisors (17938846230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9973721232 is a wasteful number, since it uses less digits than its factorization.

9973721232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69261967 (or 69261958 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 9973721232 is about 99868.5197246860. The cubic root of 9973721232 is about 2152.5458381947.

The spelling of 9973721232 in words is "nine billion, nine hundred seventy-three million, seven hundred twenty-one thousand, two hundred thirty-two".