2106894699697 has 2 divisors, whose sum is σ = 2106894699698. Its totient is φ = 2106894699696.

The previous prime is 2106894699629. The next prime is 2106894699731. The reversal of 2106894699697 is 7969964986012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2081025515776 + 25869183921 = 1442576^2 + 160839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2106894699697 is a prime.

It is a super-2 number, since 2×2106894699697² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2106894693697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053447349848 + 1053447349849.

It is an arithmetic number, because the mean of its divisors is an integer number (1053447349849).

Almost surely, 2^{2106894699697} is an apocalyptic number.

It is an amenable number.

2106894699697 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106894699697 is an equidigital number, since it uses as much as digits as its factorization.

2106894699697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 634894848, while the sum is 76.

The spelling of 2106894699697 in words is "two trillion, one hundred six billion, eight hundred ninety-four million, six hundred ninety-nine thousand, six hundred ninety-seven".