975647243981 has 2 divisors, whose sum is σ = 975647243982. Its totient is φ = 975647243980.

The previous prime is 975647243951. The next prime is 975647243999. The reversal of 975647243981 is 189342746579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 900489021481 + 75158222500 = 948941^2 + 274150^2 .

It is a cyclic number.

It is not a de Polignac number, because 975647243981 - 2³⁴ = 958467374797 is a prime.

It is a super-2 number, since 2×975647243981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975647243911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487823621990 + 487823621991.

It is an arithmetic number, because the mean of its divisors is an integer number (487823621991).

Almost surely, 2^975647243981 is an apocalyptic number.

It is an amenable number.

975647243981 is a deficient number, since it is larger than the sum of its proper divisors (1).

975647243981 is an equidigital number, since it uses as much as digits as its factorization.

975647243981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91445760, while the sum is 65.

The spelling of 975647243981 in words is "nine hundred seventy-five billion, six hundred forty-seven million, two hundred forty-three thousand, nine hundred eighty-one".