972755397 has 12 divisors (see below), whose sum is σ = 1406132364. Its totient is φ = 648023040.

The previous prime is 972755389. The next prime is 972755401. The reversal of 972755397 is 793557279.

It can be written as a sum of positive squares in 2 ways, for example, as 825642756 + 147112641 = 28734^2 + 12129^2 .

It is not a de Polignac number, because 972755397 - 2³ = 972755389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972755327) 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 11 ways as a sum of consecutive naturals, for example, 27004 + ... + 51717.

It is an arithmetic number, because the mean of its divisors is an integer number (117177697).

Almost surely, 2^972755397 is an apocalyptic number.

It is an amenable number.

972755397 is a deficient number, since it is larger than the sum of its proper divisors (433376967).

972755397 is a wasteful number, since it uses less digits than its factorization.

972755397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80100 (or 80097 counting only the distinct ones).

The product of its digits is 4167450, while the sum is 54.

The square root of 972755397 is about 31189.0268684356. The cubic root of 972755397 is about 990.8347199432.

The spelling of 972755397 in words is "nine hundred seventy-two million, seven hundred fifty-five thousand, three hundred ninety-seven".