997342087871 has 2 divisors, whose sum is σ = 997342087872. Its totient is φ = 997342087870.

The previous prime is 997342087867. The next prime is 997342087901. The reversal of 997342087871 is 178780243799.

It is a weak prime.

It is an emirp because it is prime and its reverse (178780243799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997342087871 - 2² = 997342087867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997342087798 and 997342087807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997342087171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498671043935 + 498671043936.

It is an arithmetic number, because the mean of its divisors is an integer number (498671043936).

Almost surely, 2^997342087871 is an apocalyptic number.

997342087871 is a deficient number, since it is larger than the sum of its proper divisors (1).

997342087871 is an equidigital number, since it uses as much as digits as its factorization.

997342087871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42674688, while the sum is 65.

The spelling of 997342087871 in words is "nine hundred ninety-seven billion, three hundred forty-two million, eighty-seven thousand, eight hundred seventy-one".