997960543 has 4 divisors (see below), whose sum is σ = 1009984248. Its totient is φ = 985936840.

The previous prime is 997960507. The next prime is 997960553. The reversal of 997960543 is 345069799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345069799 = 1801 ⋅191599.

It is a cyclic number.

It is not a de Polignac number, because 997960543 - 2²⁵ = 964406111 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 (997960553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6011728 + ... + 6011893.

It is an arithmetic number, because the mean of its divisors is an integer number (252496062).

Almost surely, 2^997960543 is an apocalyptic number.

997960543 is a deficient number, since it is larger than the sum of its proper divisors (12023705).

997960543 is a wasteful number, since it uses less digits than its factorization.

997960543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12023704.

The product of its (nonzero) digits is 1837080, while the sum is 52.

The square root of 997960543 is about 31590.5134969345. The cubic root of 997960543 is about 999.3197183218.

The spelling of 997960543 in words is "nine hundred ninety-seven million, nine hundred sixty thousand, five hundred forty-three".