997803543 has 16 divisors (see below), whose sum is σ = 1465725312. Its totient is φ = 598740000.

The previous prime is 997803529. The next prime is 997803553. The reversal of 997803543 is 345308799.

It is not a de Polignac number, because 997803543 - 2¹⁴ = 997787159 is a prime.

It is a super-2 number, since 2×997803543² = 1991223820846705698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 997803492 and 997803501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997803553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146353 + ... + 153018.

It is an arithmetic number, because the mean of its divisors is an integer number (91607832).

Almost surely, 2^997803543 is an apocalyptic number.

997803543 is a deficient number, since it is larger than the sum of its proper divisors (467921769).

997803543 is a wasteful number, since it uses less digits than its factorization.

997803543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299486.

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 997803543 is about 31588.0284759907. The cubic root of 997803543 is about 999.2673109646.

The spelling of 997803543 in words is "nine hundred ninety-seven million, eight hundred three thousand, five hundred forty-three".