197008945005709 has 2 divisors, whose sum is σ = 197008945005710. Its totient is φ = 197008945005708.

The previous prime is 197008945005611. The next prime is 197008945005727. The reversal of 197008945005709 is 907500549800791.

197008945005709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191338664880484 + 5670280125225 = 13832522^2 + 2381235^2 .

It is an emirp because it is prime and its reverse (907500549800791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197008945005709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197008945005749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98504472502854 + 98504472502855.

It is an arithmetic number, because the mean of its divisors is an integer number (98504472502855).

Almost surely, 2^{197008945005709} is an apocalyptic number.

It is an amenable number.

197008945005709 is a deficient number, since it is larger than the sum of its proper divisors (1).

197008945005709 is an equidigital number, since it uses as much as digits as its factorization.

197008945005709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28576800, while the sum is 64.

The spelling of 197008945005709 in words is "one hundred ninety-seven trillion, eight billion, nine hundred forty-five million, five thousand, seven hundred nine".