108947804242657 has 2 divisors, whose sum is σ = 108947804242658. Its totient is φ = 108947804242656.

The previous prime is 108947804242561. The next prime is 108947804242709. The reversal of 108947804242657 is 756242408749801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66102087041761 + 42845717200896 = 8130319^2 + 6545664^2 .

It is an emirp because it is prime and its reverse (756242408749801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108947804242657 - 2¹¹ = 108947804240609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 108947804242592 and 108947804242601.

It is not a weakly prime, because it can be changed into another prime (108947804240657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54473902121328 + 54473902121329.

It is an arithmetic number, because the mean of its divisors is an integer number (54473902121329).

Almost surely, 2^{108947804242657} is an apocalyptic number.

It is an amenable number.

108947804242657 is a deficient number, since it is larger than the sum of its proper divisors (1).

108947804242657 is an equidigital number, since it uses as much as digits as its factorization.

108947804242657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216760320, while the sum is 67.

The spelling of 108947804242657 in words is "one hundred eight trillion, nine hundred forty-seven billion, eight hundred four million, two hundred forty-two thousand, six hundred fifty-seven".