97750484561 has 2 divisors, whose sum is σ = 97750484562. Its totient is φ = 97750484560.

The previous prime is 97750484549. The next prime is 97750484563. The reversal of 97750484561 is 16548405779.

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., 88408102225 + 9342382336 = 297335^2 + 96656^2 .

It is a cyclic number.

It is not a de Polignac number, because 97750484561 - 2⁶ = 97750484497 is a prime.

It is a Sophie Germain prime.

Together with 97750484563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 97750484497 and 97750484506.

It is not a weakly prime, because it can be changed into another prime (97750484563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48875242280 + 48875242281.

It is an arithmetic number, because the mean of its divisors is an integer number (48875242281).

Almost surely, 2^97750484561 is an apocalyptic number.

It is an amenable number.

97750484561 is a deficient number, since it is larger than the sum of its proper divisors (1).

97750484561 is an equidigital number, since it uses as much as digits as its factorization.

97750484561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 97750484561 in words is "ninety-seven billion, seven hundred fifty million, four hundred eighty-four thousand, five hundred sixty-one".