975168221 has 2 divisors, whose sum is σ = 975168222. Its totient is φ = 975168220.

The previous prime is 975168211. The next prime is 975168247. The reversal of 975168221 is 122861579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 722803225 + 252364996 = 26885^2 + 15886^2 .

It is a cyclic number.

It is not a de Polignac number, because 975168221 - 2²⁶ = 908059357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975168211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487584110 + 487584111.

It is an arithmetic number, because the mean of its divisors is an integer number (487584111).

Almost surely, 2^975168221 is an apocalyptic number.

It is an amenable number.

975168221 is a deficient number, since it is larger than the sum of its proper divisors (1).

975168221 is an equidigital number, since it uses as much as digits as its factorization.

975168221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 975168221 is about 31227.6835676295. The cubic root of 975168221 is about 991.6532662016.

The spelling of 975168221 in words is "nine hundred seventy-five million, one hundred sixty-eight thousand, two hundred twenty-one".