997263008543 has 4 divisors (see below), whose sum is σ = 1040622269808. Its totient is φ = 953903747280.

The previous prime is 997263008537. The next prime is 997263008591. The reversal of 997263008543 is 345800362799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345800362799 = 50291 ⋅6875989.

It is a cyclic number.

It is not a de Polignac number, because 997263008543 - 2³⁰ = 996189266719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997263008503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21679630598 + ... + 21679630643.

It is an arithmetic number, because the mean of its divisors is an integer number (260155567452).

Almost surely, 2^997263008543 is an apocalyptic number.

997263008543 is a deficient number, since it is larger than the sum of its proper divisors (43359261265).

997263008543 is a wasteful number, since it uses less digits than its factorization.

997263008543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43359261264.

The product of its (nonzero) digits is 9797760, while the sum is 56.

The spelling of 997263008543 in words is "nine hundred ninety-seven billion, two hundred sixty-three million, eight thousand, five hundred forty-three".