97434056557 has 2 divisors, whose sum is σ = 97434056558. Its totient is φ = 97434056556.

The previous prime is 97434056509. The next prime is 97434056561. The reversal of 97434056557 is 75565043479.

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., 73216783396 + 24217273161 = 270586^2 + 155619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97434056557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97434056498 and 97434056507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97434006557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48717028278 + 48717028279.

It is an arithmetic number, because the mean of its divisors is an integer number (48717028279).

Almost surely, 2^97434056557 is an apocalyptic number.

It is an amenable number.

97434056557 is a deficient number, since it is larger than the sum of its proper divisors (1).

97434056557 is an equidigital number, since it uses as much as digits as its factorization.

97434056557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876000, while the sum is 55.

The spelling of 97434056557 in words is "ninety-seven billion, four hundred thirty-four million, fifty-six thousand, five hundred fifty-seven".