973549561 has 2 divisors, whose sum is σ = 973549562. Its totient is φ = 973549560.

The previous prime is 973549547. The next prime is 973549571. The reversal of 973549561 is 165945379.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 973440000 + 109561 = 31200^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 973549561 - 2⁵ = 973549529 is a prime.

It is not a weakly prime, because it can be changed into another prime (973549571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486774780 + 486774781.

It is an arithmetic number, because the mean of its divisors is an integer number (486774781).

Almost surely, 2^973549561 is an apocalyptic number.

It is an amenable number.

973549561 is a deficient number, since it is larger than the sum of its proper divisors (1).

973549561 is an equidigital number, since it uses as much as digits as its factorization.

973549561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 49.

The square root of 973549561 is about 31201.7557358556. The cubic root of 973549561 is about 991.1042879574.

The spelling of 973549561 in words is "nine hundred seventy-three million, five hundred forty-nine thousand, five hundred sixty-one".