972221732 has 6 divisors (see below), whose sum is σ = 1701388038. Its totient is φ = 486110864.

The previous prime is 972221717. The next prime is 972221741. The reversal of 972221732 is 237122279.

It can be written as a sum of positive squares in only one way, i.e., 893651236 + 78570496 = 29894^2 + 8864^2 .

It is a junction number, because it is equal to n+sod(n) for n = 972221692 and 972221701.

It is an unprimeable number.

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, 121527713 + ... + 121527720.

It is an arithmetic number, because the mean of its divisors is an integer number (283564673).

Almost surely, 2^972221732 is an apocalyptic number.

It is an amenable number.

972221732 is a deficient number, since it is larger than the sum of its proper divisors (729166306).

972221732 is a wasteful number, since it uses less digits than its factorization.

972221732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243055437 (or 243055435 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 972221732 is about 31180.4703620712. The cubic root of 972221732 is about 990.6534922885.

The spelling of 972221732 in words is "nine hundred seventy-two million, two hundred twenty-one thousand, seven hundred thirty-two".