813297543 has 4 divisors (see below), whose sum is σ = 1084396728. Its totient is φ = 542198360.

The previous prime is 813297533. The next prime is 813297553. The reversal of 813297543 is 345792318.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (813297533) and next prime (813297553).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813297543 is a prime.

It is a super-2 number, since 2×813297543² = 1322905786899673698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813297495 and 813297504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813297533) 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, 135549588 + ... + 135549593.

It is an arithmetic number, because the mean of its divisors is an integer number (271099182).

Almost surely, 2^813297543 is an apocalyptic number.

813297543 is a deficient number, since it is larger than the sum of its proper divisors (271099185).

813297543 is a wasteful number, since it uses less digits than its factorization.

813297543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271099184.

The product of its digits is 181440, while the sum is 42.

The square root of 813297543 is about 28518.3720257661. The cubic root of 813297543 is about 933.4330060929.

The spelling of 813297543 in words is "eight hundred thirteen million, two hundred ninety-seven thousand, five hundred forty-three".