975572868821 has 2 divisors, whose sum is σ = 975572868822. Its totient is φ = 975572868820.

The previous prime is 975572868793. The next prime is 975572868827. The reversal of 975572868821 is 128868275579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 710539414225 + 265033454596 = 842935^2 + 514814^2 .

It is a cyclic number.

It is not a de Polignac number, because 975572868821 - 2³⁸ = 700694961877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975572868827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487786434410 + 487786434411.

It is an arithmetic number, because the mean of its divisors is an integer number (487786434411).

Almost surely, 2^975572868821 is an apocalyptic number.

It is an amenable number.

975572868821 is a deficient number, since it is larger than the sum of its proper divisors (1).

975572868821 is an equidigital number, since it uses as much as digits as its factorization.

975572868821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135475200, while the sum is 68.

The spelling of 975572868821 in words is "nine hundred seventy-five billion, five hundred seventy-two million, eight hundred sixty-eight thousand, eight hundred twenty-one".