2197694140897 has 2 divisors, whose sum is σ = 2197694140898. Its totient is φ = 2197694140896.

The previous prime is 2197694140823. The next prime is 2197694140903. The reversal of 2197694140897 is 7980414967912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1473562921216 + 724131219681 = 1213904^2 + 850959^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197694140897 - 2³⁵ = 2163334402529 is a prime.

It is not a weakly prime, because it can be changed into another prime (2197694141897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098847070448 + 1098847070449.

It is an arithmetic number, because the mean of its divisors is an integer number (1098847070449).

Almost surely, 2^{2197694140897} is an apocalyptic number.

It is an amenable number.

2197694140897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197694140897 is an equidigital number, since it uses as much as digits as its factorization.

2197694140897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54867456, while the sum is 67.

The spelling of 2197694140897 in words is "two trillion, one hundred ninety-seven billion, six hundred ninety-four million, one hundred forty thousand, eight hundred ninety-seven".