9738973561 has 2 divisors, whose sum is σ = 9738973562. Its totient is φ = 9738973560.

The previous prime is 9738973487. The next prime is 9738973597. The reversal of 9738973561 is 1653798379.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9654241536 + 84732025 = 98256^2 + 9205^2 .

It is a cyclic number.

It is not a de Polignac number, because 9738973561 - 2¹⁵ = 9738940793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9738973496 and 9738973505.

It is not a weakly prime, because it can be changed into another prime (9738953561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4869486780 + 4869486781.

It is an arithmetic number, because the mean of its divisors is an integer number (4869486781).

Almost surely, 2^9738973561 is an apocalyptic number.

It is an amenable number.

9738973561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9738973561 is an equidigital number, since it uses as much as digits as its factorization.

9738973561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 58.

The square root of 9738973561 is about 98686.2379513983. The cubic root of 9738973561 is about 2135.5237001398.

The spelling of 9738973561 in words is "nine billion, seven hundred thirty-eight million, nine hundred seventy-three thousand, five hundred sixty-one".