97783026521 has 2 divisors, whose sum is σ = 97783026522. Its totient is φ = 97783026520.

The previous prime is 97783026511. The next prime is 97783026553. The reversal of 97783026521 is 12562038779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87145992025 + 10637034496 = 295205^2 + 103136^2 .

It is a cyclic number.

It is not a de Polignac number, because 97783026521 - 2⁶ = 97783026457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97783026521.

It is not a weakly prime, because it can be changed into another prime (97783026511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48891513260 + 48891513261.

It is an arithmetic number, because the mean of its divisors is an integer number (48891513261).

Almost surely, 2^97783026521 is an apocalyptic number.

It is an amenable number.

97783026521 is a deficient number, since it is larger than the sum of its proper divisors (1).

97783026521 is an equidigital number, since it uses as much as digits as its factorization.

97783026521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 97783026521 in words is "ninety-seven billion, seven hundred eighty-three million, twenty-six thousand, five hundred twenty-one".