97443788777 has 2 divisors, whose sum is σ = 97443788778. Its totient is φ = 97443788776.

The previous prime is 97443788749. The next prime is 97443788791. The reversal of 97443788777 is 77788734479.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77464248976 + 19979539801 = 278324^2 + 141349^2 .

It is a cyclic number.

It is not a de Polignac number, because 97443788777 - 2³⁰ = 96370046953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97443788777.

It is not a weakly prime, because it can be changed into another prime (97443788737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48721894388 + 48721894389.

It is an arithmetic number, because the mean of its divisors is an integer number (48721894389).

Almost surely, 2^97443788777 is an apocalyptic number.

It is an amenable number.

97443788777 is a deficient number, since it is larger than the sum of its proper divisors (1).

97443788777 is an equidigital number, since it uses as much as digits as its factorization.

97443788777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 464679936, while the sum is 71.

The spelling of 97443788777 in words is "ninety-seven billion, four hundred forty-three million, seven hundred eighty-eight thousand, seven hundred seventy-seven".