2017450997689 has 2 divisors, whose sum is σ = 2017450997690. Its totient is φ = 2017450997688.

The previous prime is 2017450997657. The next prime is 2017450997761. The reversal of 2017450997689 is 9867990547102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1757639577600 + 259811420089 = 1325760^2 + 509717^2 .

It is a cyclic number.

It is not a de Polignac number, because 2017450997689 - 2⁵ = 2017450997657 is a prime.

It is not a weakly prime, because it can be changed into another prime (2017450995689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008725498844 + 1008725498845.

It is an arithmetic number, because the mean of its divisors is an integer number (1008725498845).

Almost surely, 2^{2017450997689} is an apocalyptic number.

It is an amenable number.

2017450997689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2017450997689 is an equidigital number, since it uses as much as digits as its factorization.

2017450997689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68584320, while the sum is 67.

The spelling of 2017450997689 in words is "two trillion, seventeen billion, four hundred fifty million, nine hundred ninety-seven thousand, six hundred eighty-nine".