2197960921847 has 2 divisors, whose sum is σ = 2197960921848. Its totient is φ = 2197960921846.

The previous prime is 2197960921829. The next prime is 2197960921901. The reversal of 2197960921847 is 7481290697912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2197960921847 - 2¹² = 2197960917751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2197960981847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098980460923 + 1098980460924.

It is an arithmetic number, because the mean of its divisors is an integer number (1098980460924).

Almost surely, 2^{2197960921847} is an apocalyptic number.

2197960921847 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197960921847 is an equidigital number, since it uses as much as digits as its factorization.

2197960921847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27433728, while the sum is 65.

The spelling of 2197960921847 in words is "two trillion, one hundred ninety-seven billion, nine hundred sixty million, nine hundred twenty-one thousand, eight hundred forty-seven".