2002005917797 has 2 divisors, whose sum is σ = 2002005917798. Its totient is φ = 2002005917796.

The previous prime is 2002005917759. The next prime is 2002005917869. The reversal of 2002005917797 is 7977195002002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1570312240641 + 431693677156 = 1253121^2 + 657034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002005917797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2002005917797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002005917497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001002958898 + 1001002958899.

It is an arithmetic number, because the mean of its divisors is an integer number (1001002958899).

Almost surely, 2^{2002005917797} is an apocalyptic number.

It is an amenable number.

2002005917797 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002005917797 is an equidigital number, since it uses as much as digits as its factorization.

2002005917797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 555660, while the sum is 49.

The spelling of 2002005917797 in words is "two trillion, two billion, five million, nine hundred seventeen thousand, seven hundred ninety-seven".