975487561 has 2 divisors, whose sum is σ = 975487562. Its totient is φ = 975487560.

The previous prime is 975487549. The next prime is 975487589. The reversal of 975487561 is 165784579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 901200400 + 74287161 = 30020^2 + 8619^2 .

It is a cyclic number.

It is not a de Polignac number, because 975487561 - 2¹¹ = 975485513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 975487499 and 975487508.

It is not a weakly prime, because it can be changed into another prime (975487501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487743780 + 487743781.

It is an arithmetic number, because the mean of its divisors is an integer number (487743781).

Almost surely, 2^975487561 is an apocalyptic number.

It is an amenable number.

975487561 is a deficient number, since it is larger than the sum of its proper divisors (1).

975487561 is an equidigital number, since it uses as much as digits as its factorization.

975487561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 52.

The square root of 975487561 is about 31232.7962404905. The cubic root of 975487561 is about 991.7615005165.

The spelling of 975487561 in words is "nine hundred seventy-five million, four hundred eighty-seven thousand, five hundred sixty-one".